TY  - JOUR
AU  - V. D. Sedykh
TI  - Theorem on Four Support Vertices of a Polygonal Line
JO  - Funkcionalʹnyj analiz i ego priloženiâ
PY  - 1996
SP  - 88
EP  - 90
VL  - 30
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FAA_1996_30_3_a11/
LA  - ru
ID  - FAA_1996_30_3_a11
ER  -