Inheritance of symmetry for positive solutions of semilinear elliptic boundary value problems Bernd Kawohl; Guido Sweers — 2002 Annales de l'I.H.P. Analyse non linéaire
Existence and multiplicity results for a semilinear elliptic eigenvalue problem Philippe Clément; Guido Sweers — 1987 Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
Optimal conditions for anti-maximum principles Hans-Christoph Grunau; Guido Sweers — 2001 Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
When is the first eigenfunction for the clamped plate equation of fixed sign? Sweers, Guido — 2001 Electronic Journal of Differential Equations (EJDE) [electronic only]
Regularity for a clamped grid equation u x x x x + u y y y y = f on a domain with a corner. Gerasimov, Tymofiy; Sweers, Guido — 2009 Electronic Journal of Differential Equations (EJDE) [electronic only]