Idzik, Adam, Władysław Kulpa, and Piotr Maćkowiak. “Equivalent Forms of the Brouwer Fixed Point Theorem”. Topological Methods in Nonlinear Analysis 44, no. 1 (April 12, 2016): 263–276. Accessed April 23, 2024. https://apcz.umk.pl/TMNA/article/view/TMNA.2014.047.