TY  - JOUR
AU  - I. V. Artamkin
TI  - Combinatorics of trivalent ribbon graphs with two faces
JO  - Fundamentalʹnaâ i prikladnaâ matematika
PY  - 2007
SP  - 113
EP  - 120
VL  - 13
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FPM_2007_13_6_a4/
LA  - ru
ID  - FPM_2007_13_6_a4
ER  -