Landesman, E. M.; Lazer, A. C. Nonlinear perturbations of linear elliptic boundary value problems at resonance. (English) Zbl 0193.39203 J. Math. Mech. 19, 609-623 (1970). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 9 ReviewsCited in 333 Documents Keywords:partial differential equations PDFBibTeX XMLCite \textit{E. M. Landesman} and \textit{A. C. Lazer}, J. Math. Mech. 19, 609--623 (1970; Zbl 0193.39203)