TY  - JOUR
AU  - D. A. Permyakov
TI  - Regular homotopy for immersions of graphs into surfaces
JO  - Sbornik. Mathematics
PY  - 2016
SP  - 854
EP  - 872
VL  - 207
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_2016_207_6_a4/
LA  - en
ID  - SM_2016_207_6_a4
ER  -