@article{1077490203, author = {Mac Lane, Saunders}, title = {A structural characterization of planar combinatorial graphs}, journal = {Duke Math. J.}, volume = {3}, number = {1}, year = {1937}, pages = { 460-472}, language = {en}, url = {http://dml.mathdoc.fr/item/1077490203} }
Mac Lane, Saunders. A structural characterization of planar combinatorial graphs. Duke Math. J., Tome 3 (1937) no. 1, pp. 460-472. http://gdmltest.u-ga.fr/item/1077490203/