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@article{PHSC_1996__1_4_85_0, author = {Gropp, Harald}, title = {Poincar\'e and graph theory}, journal = {Philosophia Scientiae}, pages = {85--95}, publisher = {\'Editions Kim\'e}, volume = {1}, number = {4}, year = {1996}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PHSC_1996__1_4_85_0/} }
Gropp, Harald. Poincaré and graph theory. Philosophia Scientiae, Poincaré. Actes du Congrès International Henri Poincaré. Nancy 1994, Tome 1 (1996) no. 4, pp. 85-95. http://geodesic.mathdoc.fr/item/PHSC_1996__1_4_85_0/