TY  - JOUR
AU  - V. P. Soltan
AU  - V. D. Chepoi
TI  - Some classes of d-convex functions in a graph
JO  - Doklady Akademii Nauk
PY  - 1983
SP  - 1314
EP  - 1317
VL  - 273
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1983_273_6_a7/
LA  - ru
ID  - DAN_1983_273_6_a7
ER  -