A new type of solutions for a singularly perturbed elliptic Neumann problem. G. Li; S. Peng; S. Yan — 2007 Revista Matemática Iberoamericana
Nonlinear ergodic theorems for a semitopological semigroup of non-Lipschitzian mappings without convexity. Li, G.; Kim, J.K. — 1999 Abstract and Applied Analysis