@article {Zeilmann:2020aa,
	title = {Geometric Numerical Integration of the Assignment Flow},
	journal = {Inverse Problems},
	volume = {36},
	number = {3},
	year = {2020},
	pages = {034004 (33pp)},
	author = {Zeilmann, A. and Savarino, F. and Petra, S. and Schn{\"o}rr, C.}
}
@article {Censor:2020aa,
	title = {Superiorization vs. Accelerated Convex Optimization: The Superiorized/Regularized Least Squares Case},
	journal = {J. Appl. Numer. Optimization (in press; arXiv:1911.05498)},
	volume = {2},
	number = {1},
	year = {2020},
	pages = {15-62},
	url = {http://jano.biemdas.com/archives/1060},
	author = {Censor, Y. and Petra, S. and Schn{\"o}rr, C.}
}
@article {Zern:2020ab,
	title = {Unsupervised Assignment Flow: Label Learning on Feature Manifolds by Spatially Regularized Geometric Assignment},
	journal = {Journal of Mathematical Imaging and Vision},
	year = {2020},
	url = {https://doi.org/10.1007/s10851-019-00935-7},
	author = {Zern, A. and M. Zisler and Petra, S. and Schn{\"o}rr, C.}
}
@article {Zeilmann:2019aa,
	title = {Geometric Numerical Integration of the Assignment Flow},
	journal = {Inverse Problems},
	year = {2019},
	url = {https://doi.org/10.1088/1361-6420/ab2772},
	author = {Zeilmann, A. and Savarino, F. and Petra, S. and Schn{\"o}rr, C.}
}
@article {Huhnerbein:2019ab,
	title = {Learning Adaptive Regularization for Image Labeling Using Geometric Assignment},
	journal = {preprint: arXiv},
	year = {2019},
	url = {https://arxiv.org/abs/1910.09976},
	author = {H{\"u}hnerbein, R. and Savarino, F. and Petra, S. and Schn{\"o}rr, C.}
}
@conference {Huhnerbein:2019aa,
	title = {Learning Adaptive Regularization for Image Labeling Using Geometric Assignment},
	booktitle = {Proc. SSVM},
	year = {2019},
	publisher = {Springer},
	organization = {Springer},
	author = {H{\"u}hnerbein, R. and Savarino, F. and Petra, S. and Schn{\"o}rr, C.}
}
@article {Zisler:2019ab,
	title = {Self-Assignment Flows for Unsupervised Data Labeling on Graphs},
	journal = {preprint: arXiv},
	year = {2019},
	url = {https://arxiv.org/abs/1911.03472},
	author = {M. Zisler and Zern, A. and Petra, S. and Schn{\"o}rr, C.}
}
@article {Censor:2019aa,
	title = {Superiorization vs. Accelerated Convex Optimization: The Superiorized/Regularized Least Squares Case},
	journal = {preprint: arXiv},
	year = {2019},
	url = {https://arxiv.org/abs/1911.05498},
	author = {Censor, Y. and Petra, S. and Schn{\"o}rr, C.}
}
@article {Zern:2019aa,
	title = {Unsupervised Assignment Flow: Label Learning on Feature Manifolds by Spatially Regularized Geometric Assignment},
	journal = {preprint: arXiv},
	year = {2019},
	url = {https://arxiv.org/abs/1904.10863},
	author = {Zern, A. and M. Zisler and Petra, S. and Schn{\"o}rr, C.}
}
@conference {Zisler:2019aa,
	title = {Unsupervised Labeling by Geometric and Spatially Regularized Self-Assignment},
	booktitle = {Proc. SSVM},
	year = {2019},
	publisher = {Springer},
	organization = {Springer},
	author = {M. Zisler and Zern, A. and Petra, S. and Schn{\"o}rr, C.}
}
@article {Zeilmann:2018aa,
	title = {Geometric Numerical Integration of the Assignment Flow},
	journal = {preprint: arXiv},
	year = {2018},
	url = {https://arxiv.org/abs/1810.06970},
	author = {Zeilmann, A. and Savarino, F. and Petra, S. and Schn{\"o}rr, C.}
}
@conference {Zern:2018ac,
	title = {Unsupervised Label Learning on Manifolds by Spatially Regularized Geometric Assignment},
	booktitle = {GCPR},
	year = {2018},
	author = {Zern, A. and M. Zisler and Astr{\"o}m, F. and Petra, S. and Schn{\"o}rr, C.}
}
@conference {Dalitz2017,
	title = {Compressed Motion Sensing},
	booktitle = {Proc. SSVM},
	series = {LNCS},
	volume = {10302},
	year = {2017},
	publisher = {Springer},
	organization = {Springer},
	author = {Dalitz, R. and Petra, S. and Schn{\"o}rr, C.}
}
@conference {Zisler2017a,
	title = {Gradient Flows on a Riemannian Submanifold for Discrete Tomography},
	booktitle = {Proc. GCPR},
	year = {2017},
	author = {M. Zisler and Savarino, F. and Petra, S. and Schn{\"o}rr, C.}
}
@article {Astroem2017,
	title = {Image Labeling by Assignment},
	journal = {J. Math. Imag. Vision},
	volume = {58},
	number = {2},
	year = {2017},
	pages = {211{\textendash}238},
	url = {Papers/Astroem2017.pdf},
	author = {Astr{\"o}m, F. and Petra, S. and Schmitzer, B. and Schn{\"o}rr, C.}
}
@conference {Zisler2017,
	title = {Image Reconstruction by Multilabel Propagation},
	booktitle = {Proc. SSVM},
	series = {LNCS},
	volume = {10302},
	year = {2017},
	publisher = {Springer},
	organization = {Springer},
	author = {M. Zisler and Astr{\"o}m, F. and Petra, S. and Schn{\"o}rr, C.}
}
@conference {Bodnariuc2017a,
	title = {A Local Spatio-Temporal Approach to Plane Wave Ultrasound Particle Image Velocimetry},
	booktitle = {Proc. GCPR},
	year = {2017},
	author = {Ecaterina Bodnariuc and Petra, S. and Schn{\"o}rr, C. and Voorneveld, J.}
}
@conference {Astroem2016a,
	title = {The Assignment Manifold: A Smooth Model for Image Labeling},
	booktitle = {Proc. 2nd Int. Workshop on Differential Geometry in Computer Vision and Machine Learning (DIFF-CVML{\textquoteright}16; oral presentation; Grenander best paper award)},
	year = {2016},
	author = {Astr{\"o}m, F. and Petra, S. and Schmitzer, B. and Schn{\"o}rr, C.}
}
@conference {Zisler2016a,
	title = {Discrete Tomography by Continuous Multilabeling Subject to Projection Constraints},
	booktitle = {Proc. GCPR},
	year = {2016},
	author = {M. Zisler and Petra, S. and Schn{\"o}rr, Cl. and Christoph Schn{\"o}rr}
}
@conference {Astroem2016d,
	title = {A Geometric Approach to Image Labeling},
	booktitle = {Proc. ECCV},
	year = {2016},
	author = {Astr{\"o}m, F. and Petra, S. and Schmitzer, B. and Schn{\"o}rr, C.}
}
@booklet {Astroem2016,
	title = {Image Labeling by Assignment},
	year = {2016},
	note = {ArXiv, preprint},
	month = {March},
	url = {http://arxiv.org/abs/1603.05285},
	author = {Astr{\"o}m, F. and Petra, S. and Schmitzer, B. and Schn{\"o}rr, C.}
}
@article {Zisler2016,
	title = {Non-Binary Discrete Tomography by Continuous Non-Convex Optimization},
	journal = {IEEE Comp. Imaging},
	volume = {2},
	number = {3},
	year = {2016},
	pages = {335-347},
	author = {M. Zisler and Kappes, J.H. and Schn{\"o}rr, Cl. and Petra, S. and Christoph Schn{\"o}rr}
}
@conference {Bodnariuc2016,
	title = {Parametric Dictionary-Based Velocimetry for Echo PIV},
	booktitle = {Proc. CGPR},
	year = {2016},
	author = {Ecaterina Bodnariuc and Petra, S. and Poelma, C. and Schn{\"o}rr, C.}
}
@conference {Kappes2015b,
	title = {TomoGC: Binary Tomography by Constrained Graph Cuts},
	booktitle = {Proc. GCPR},
	year = {2015},
	author = {Kappes, J.H. and Petra, S. and Schn{\"o}rr, C. and M. Zisler}
}
@article {Denitiu2014a,
	title = {Phase Transitions and Cosparse Tomographic Recovery of Compound Solid Bodies from Few Projections},
	journal = {Fundamenta Informaticae},
	volume = {135},
	year = {2014},
	pages = {73{\textendash}102},
	author = {Andreea Denitiu and Petra, S. and Schn{\"o}rr, Cl. and Christoph Schn{\"o}rr}
}
@booklet {Petra-Schnoerr-12b,
	title = {Critical Parameter Values and Reconstruction Properties of Discrete Tomography: Application to Experimental Fluid Dynamics},
	year = {2012},
	month = {September 19},
	url = {http://arxiv.org/abs/1209.4316},
	author = {Petra, S. and Schn{\"o}rr, C. and Schr{\"o}der, A.}
}
@article {Nicola-et-al-2011,
	title = {A general extending and constraining procedure for linear iterative methods},
	journal = {Int. J. Comp. Math.},
	year = {2011},
	note = {in press},
	url = {http://dx.doi.org/10.1080/00207160.2011.634002},
	author = {Nicola, A. and Petra, S. and Popa, C. and Schn{\"o}rr, C.}
}
@techreport {popa09,
	title = {On a general extending and constraining procedure for linear iterative methods},
	year = {2009},
	month = {August},
	institution = {IWR, University of Heidelberg},
	type = {Technical Report},
	url = {http://www.ub.uni-heidelberg.de/archiv/9761},
	author = {Nicola, A. and Petra, S. and Popa, C. and Schn{\"o}rr, C.}
}
@techreport {petra09c,
	title = {TomoPIV meets Compressed Sensing},
	year = {2009},
	month = {August},
	institution = {IWR, University of Heidelberg},
	type = {Technical Report},
	url = {http://www.ub.uni-heidelberg.de/archiv/9760},
	author = {Petra, S. and Schn{\"o}rr, C.}
}
@article {Petra-Schnoerr-PUMA-10,
	title = {TomoPIV meets Compressed Sensing},
	journal = {Pure Math. Appl.},
	volume = {20},
	number = {1-2},
	year = {2009},
	pages = {49 {\textendash} 76},
	url = {http://www.mat.unisi.it/newsito/puma/public_html/contents.php},
	author = {Petra, S. and Schn{\"o}rr, C.}
}
@conference {petra-wmm08,
	title = {Enhancing Sparsity by Constraining Strategies: Constrained SIRT versus Spectral Projected Gradient Methods},
	booktitle = {Proc. 7th Workshop on Modelling of Environmental and Life Sciences Problems (WMM 08)},
	year = {2008},
	month = {Oct. 22-Oct. 25},
	publisher = {Ed Acad Romane, Bucuresti},
	organization = {Ed Acad Romane, Bucuresti},
	address = {Constanta, Romania},
	author = {Petra, S. and Popa, C. and Schn{\"o}rr, C.}
}
@conference {Petra-et-al-08b,
	title = {Enhancing Sparsity by Constraining Strategies: Constrained SIRT versus Spectral Projected Gradient Methods},
	booktitle = {Proc. 7th Workshop on Modelling of Environmental and Life Sciences Problems (WMM 08)},
	series = {Ed Acad Romane},
	year = {2008},
	address = {Bucharest, Romania},
	author = {Petra, S. and Popa, C. and Schn{\"o}rr, C.}
}
@conference {Petra-et-al-08,
	title = {On Sparsity Maximization in Tomographic Particle Image Reconstruction},
	booktitle = {Pattern Recognition {\textendash} 30th DAGM Symposium},
	series = {lncs},
	volume = {5096},
	year = {2008},
	pages = {294{\textendash}303},
	publisher = {Springer Verlag},
	organization = {Springer Verlag},
	author = {Petra, S. and Schr{\"o}der, A. and Wieneke, B. and Schn{\"o}rr, C.}
}
@conference {petra-wmm07,
	title = {Tomographic Image Reconstruction in Experimental Fluid Dynamics: Synopsis and Problems},
	booktitle = {Proc. 6th Workshop on Modelling of Environmental and Life Sciences Problems (WMM 07)},
	year = {2007},
	month = {Sept. 5-Sept. 9},
	publisher = {Ed Acad Romane, Bucuresti},
	organization = {Ed Acad Romane, Bucuresti},
	address = {Constanta, Romania},
	author = {Petra, S. and Schn{\"o}rr, C. and A. Schr{\"o}der and B. Wieneke}
}
