S. Chaplick, E. Cohen, and G. Morgenstern. Proceedings of the 25th Canadian Conference on Computational Geometry, CCCG 2013, Waterloo, Ontario, Canada, August 8-10, 2013, Carleton University, Ottawa, Canada, (2013)
B. Heisele, I. Riskov, and C. Morgenstern. Toward Category-Level Object Recognition, volume 4170 of Lecture Notes in Computer Science, page 225-237. Springer, (2006)