A. Cohen, and V. Pavlovic. IEEE International Conference on Computer Vision Workshops, ICCV 2011 Workshops, Barcelona, Spain, November 6-13, 2011, page 852-859. (2011)50\% contribution.
S. Chaplick, E. Cohen, and J. Stacho. Graph-Theoretic Concepts in Computer Science - 37th International
Workshop, WG 2011, Teplá Monastery, Czech Republic, June 21-24,
2011. Revised Papers, volume 6986 of Lecture Notes in Computer Science, page 319--330. Springer, (2011)
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)
D. Cohen, and A. Suciu. North-Holland Publishing Co., Amsterdam, (February 2002)Papers from the conference held at Northeastern University, Boston, MA, June 12--15, 1999, Topology Appl. 118 (2002), no. 1-2.