TY  - JOUR
AU  - Clarke, Frank H.
TI  - Inequality Constraints in the Calculus of Variations
JO  - Canadian journal of mathematics
PY  - 1977
SP  - 528
EP  - 540
VL  - 29
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1977-055-6/
DO  - 10.4153/CJM-1977-055-6
ID  - 10_4153_CJM_1977_055_6
ER  -