Takahashi, W. and To-Ming Lau, A. (1995) “Invariant means and fixed point properties for non-expansive representations of topological semigroups”, Topological Methods in Nonlinear Analysis, 5(1), pp. 39–57. Available at: https://apcz.umk.pl/TMNA/article/view/TMNA.1995.003 (Accessed: 22 July 2024).