Tang, Chun-Lei An existence theorem of nontrivial solutions of semilinear equations in reflexive Banach spaces and its applications. (English) Zbl 1194.47071 Bull. Cl. Sci., VI. Sér., Acad. R. Belg. 7, No. 1-6, 87-100 (1996). Cited in 2 Documents MSC: 47H10 Fixed-point theorems 34C25 Periodic solutions to ordinary differential equations 58E05 Abstract critical point theory (Morse theory, Lyusternik-Shnirel’man theory, etc.) in infinite-dimensional spaces 70F05 Two-body problems PDF BibTeX XML Cite \textit{C.-L. Tang}, Bull. Cl. Sci., VI. Sér., Acad. R. Belg. 7, No. 1--6, 87--100 (1996; Zbl 1194.47071)