B.  Ommer and Buhmann, J. M., ?Learning the Compositional Nature of Visual Object Categories for Recognition?, IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. 32, p. 501--516, 2010.

B.  Ommer and Buhmann, J. M., ?Learning the Compositional Nature of Visual Objects?, in Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition, 2007, p. 1--8.

B.  Ommer and Buhmann, J. M., ?Learning Compositional Categorization Models?, in Proceedings of the European Conference on Computer Vision, 2006, vol. 3953, p. 316--329.