Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1991_316_2_a1, author = {K. Yu. Gorbunov}, title = {Context-free deducibility of graphs that do not realize a planar}, journal = {Doklady Akademii Nauk}, pages = {270--274}, publisher = {mathdoc}, volume = {316}, number = {2}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1991_316_2_a1/} }
K. Yu. Gorbunov. Context-free deducibility of graphs that do not realize a planar. Doklady Akademii Nauk, Tome 316 (1991) no. 2, pp. 270-274. http://geodesic.mathdoc.fr/item/DAN_1991_316_2_a1/