Liouville theorems for semilinear equations on the Heisenberg group

Birindelli, I.; Capuzzo Dolcetta, I.; Cutrì, A.

Annales de l'I.H.P. Analyse non linéaire, Volume 14 (1997) p. 295-308

Discrete dynamic programming and viscosity solutions of the Bellman equation

Capuzzo Dolcetta, I.; Falcone, M.

Annales de l'I.H.P. Analyse non linéaire, Volume 6 (1989) p. 161-183