TY  - JOUR
AU  - Clarke, Francis
TI  - The maximum principle in optimal control, then and now
JO  - Control and Cybernetics
PY  - 2005
SP  - 709
EP  - 722
VL  - 34
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CC_2005_34_3_a4/
LA  - en
ID  - CC_2005_34_3_a4
ER  -