TY  - JOUR
AU  - M. G. Tagiev
TI  - A~necessary and sufficient condition for a~strong extremum in~a~degenerate problem of~the~calculus of~variations
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1979
SP  - 187
EP  - 188
VL  - 34
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1979_34_4_a24/
LA  - en
ID  - RM_1979_34_4_a24
ER  -