Journal of Applied Mathematics and Stochastic Analysis
Multiple fixed points of weakly inward mappings are investigated by means of ordinary differential equations in abstract spaces.
Jingxian Sun and Yong Sun, “A theorem on many fixed points for nonlinear operator,” Journal of Applied Mathematics and Stochastic Analysis, vol. 3, no. 4, pp. 203-208, 1990. doi:10.1155/S1048953390000193