@article{DM_1990_2_4_a10,
     author = {V. B. Alekseev and V. P. Korzhik},
     title = {Embeddings of graphs in a~surface and the theory of flow graphs},
     journal = {Diskretnaya Matematika},
     pages = {97--115},
     publisher = {mathdoc},
     volume = {2},
     number = {4},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1990_2_4_a10/}
}