TY  - JOUR
AU  - G. A. Karpunin
TI  - An analogue of Morse theory for planar linear networks and the~generalized Steiner problem
JO  - Sbornik. Mathematics
PY  - 2000
SP  - 209
EP  - 233
VL  - 191
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_2000_191_2_a2/
LA  - en
ID  - SM_2000_191_2_a2
ER  -