On the second boundary value problem for equations of Monge-Ampère type. John Urbas — 1997 Journal für die reine und angewandte Mathematik
Nonlinear oblique boundary value problems for hessian equations in two dimensions John Urbas — 1995 Annales de l'I.H.P. Analyse non linéaire
On the expansion of starshaped hypersurfaces by symmetric functions of their principal curvatures. John I.E. Urbas — 1990 Mathematische Zeitschrift
Global Hölder estimates for equations of Monge-Ampère type. John I.E. Urbas — 1988 Inventiones mathematicae
Regularity of Generalized Solutions of Monge-Ampère Equations. John I.E. Urbas — 1988 Mathematische Zeitschrift
The generalized Dirichlet problem for equations of Monge-Ampère type John I. E. Urbas — 1986 Annales de l'I.H.P. Analyse non linéaire