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@article{FPM_2007_13_6_a4, author = {I. V. Artamkin}, title = {Combinatorics of trivalent ribbon graphs with two faces}, journal = {Fundamentalʹna\^a i prikladna\^a matematika}, pages = {113--120}, publisher = {mathdoc}, volume = {13}, number = {6}, year = {2007}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/FPM_2007_13_6_a4/} }
I. V. Artamkin. Combinatorics of trivalent ribbon graphs with two faces. Fundamentalʹnaâ i prikladnaâ matematika, Tome 13 (2007) no. 6, pp. 113-120. http://geodesic.mathdoc.fr/item/FPM_2007_13_6_a4/
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