Jean-Pierre Raymond, H. Zidani. Pontryagin's principle for state-constrained control problems governed by parabolic equations with unbounded controls.
SIAM Journal on Control and Optimization, Society for Industrial and Applied Mathematics, 1998, 36 (3), pp.1853-1879.
⟨10.1137/S0363012996302470⟩.
⟨hal-01254040⟩