Solvability of monotone systems of fully nonlinear elliptic PDE's

Alexander Quaas; Boyan Sirakov

Comptes Rendus. Mathématique, Volume 346 (2008) p. 641-644

On the principal eigenvalues and the Dirichlet problem for fully nonlinear operators

Alexander Quaas; Boyan Sirakov

Comptes Rendus. Mathématique, Volume 342 (2006) p. 115-118