TY  - JOUR
AU  - Castelpietra, Marco
TI  - Interior sphere property for level sets of the value function of an exit time problem
JO  - ESAIM: Control, Optimisation and Calculus of Variations
PY  - 2009
SP  - 102
EP  - 116
VL  - 15
IS  - 1
PB  - EDP-Sciences
UR  - http://www.numdam.org/articles/10.1051/cocv:2008018/
DO  - 10.1051/cocv:2008018
LA  - en
ID  - COCV_2009__15_1_102_0
ER  -