The Bremermann-Dirichlet problem for q -plurisubharmonic functions Zbigniew Slodkowski (1984) Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
The homogeneous Dirichlet problem for non-elliptic partial differential equations with strong nonlinearities Gerald G. Warnecke (1989) Commentationes Mathematicae Universitatis Carolinae