Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1966_166_1_a3, author = {G. V. Epifanov}, title = {Reduction of a plane graph to an edge by star-triangle transformations}, journal = {Doklady Akademii Nauk}, pages = {19--22}, publisher = {mathdoc}, volume = {166}, number = {1}, year = {1966}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1966_166_1_a3/} }
G. V. Epifanov. Reduction of a plane graph to an edge by star-triangle transformations. Doklady Akademii Nauk, Tome 166 (1966) no. 1, pp. 19-22. http://geodesic.mathdoc.fr/item/DAN_1966_166_1_a3/