Agarwal, R. P., O’Regan, D. and Precup, R. (2003) “Fixed point theory and generalized Leray-Schauder alternatives for approximable maps in topological vector spaces”, Topological Methods in Nonlinear Analysis, 22(1), pp. 193–202. Available at: https://apcz.umk.pl/TMNA/article/view/TMNA.2003.036 (Accessed: 14 December 2024).