Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1989_305_6_a2, author = {V. A. Gurvich and G. B. Shabat}, title = {Maps of surfaces and their schemes}, journal = {Doklady Akademii Nauk}, pages = {1298--1303}, publisher = {mathdoc}, volume = {305}, number = {6}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1989_305_6_a2/} }
V. A. Gurvich; G. B. Shabat. Maps of surfaces and their schemes. Doklady Akademii Nauk, Tome 305 (1989) no. 6, pp. 1298-1303. http://geodesic.mathdoc.fr/item/DAN_1989_305_6_a2/