A.  Nicola, Petra, S., Popa, C., and Schnörr, C., ?A general extending and constraining procedure for linear iterative methods?, Int.~J.~Comp.~Math., 2011.

A.  Nicola, Petra, S., Popa, C., and Schnörr, C., ?A general extending and constraining procedure for linear iterative methods?, Int. J. Comp. Math., 2011.

S.  Petra, Popa, C., and Schnörr, C., ?Accelerating Constrained SIRT with Applications in Tomographic Particle Image Reconstruction?, IWR, University of Heidelberg, 2009.

A.  Nicola, Petra, S., Popa, C., and Schnörr, C., ?On a general extending and constraining procedure for linear iterative methods?, IWR, University of Heidelberg, 2009.

A.  Nicola, Petra, S., Popa, C., and Schnörr, C., ?On a general extending and constraining procedure for linear iterative methods?, IWR, University of Heidelberg, 2009.

S.  Petra, Popa, C., and Schnörr, C., ?Enhancing Sparsity by Constraining Strategies: Constrained SIRT versus Spectral Projected Gradient Methods?, in Proc. 7th Workshop on Modelling of Environmental and Life Sciences Problems (WMM 08), Constanta, Romania, 2008.

S.  Petra, Popa, C., and Schnörr, C., ?Enhancing Sparsity by Constraining Strategies: Constrained SIRT versus Spectral Projected Gradient Methods?, in Proc. 7th Workshop on Modelling of Environmental and Life Sciences Problems (WMM 08), Bucharest, Romania, 2008.