A priori interior gradient bounds for solutions to elliptic Weingarten equations Nicholas J. Korevaar — 1987 Annales de l'I.H.P. Analyse non linéaire
Some R N capacities and applications - the lemma on mixed derivatives revisited J. Korevaar — 1986 Matematički Vesnik
A lemma on mixed derivatives with applications to edge-of-the-wedge, Radon transformation and a theorem of Forelli J. Wiegerinck; J. Korevaar — 1985 Matematički Vesnik
Continuity Estimates for Solutions to the Prescribed-Curvature Dirichlet Problem. Nicholas J., Simon, Leon Korevaar — 1988 Mathematische Zeitschrift