@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/}
}