Prykarpatsky, A. K. “An Infinite-Dimensional Borsuk-Ulam-Type Generalization of the Leray-Schauder Fixed-Point Theorem and Some Applications”. Ukrains’kyi Matematychnyi Zhurnal 60, no. 1 (January 25, 2008): 100–106. Accessed April 11, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/3141.