TY  - JOUR
AU  - V. V. Filippov
TI  - An investigation of stationary points in a plane
JO  - Vestnik Moskovskogo universiteta. Matematika, mehanika
PY  - 1993
SP  - 3
EP  - 11
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VMUMM_1993_5_a0/
LA  - ru
ID  - VMUMM_1993_5_a0
ER  -