Petryshyn, W. V. Variational solvability of quasilinear elliptic boundary value problems at resonance. (English) Zbl 0477.35041 Nonlinear Anal., Theory Methods Appl. 5, 1095-1108 (1981). MSC: 35J60 35A15 35A35 47H05 47H09 47J25 PDFBibTeX XMLCite \textit{W. V. Petryshyn}, Nonlinear Anal., Theory Methods Appl. 5, 1095--1108 (1981; Zbl 0477.35041) Full Text: DOI
Petryshyn, W. V. Solvability of linear and quasilinear elliptic boundary value problems via the A-proper mapping theory. (English) Zbl 0469.35048 Numer. Funct. Anal. Optimization 2, 591-635 (1980). MSC: 35J60 35A15 47J05 35J65 PDFBibTeX XMLCite \textit{W. V. Petryshyn}, Numer. Funct. Anal. Optim. 2, 591--635 (1980; Zbl 0469.35048) Full Text: DOI