Team, Support. “Remarks on Brouwer Fixed Point Theorem for Some Surfaces in $\mathbb{R}^3$: Preeyaporn Thongin, Worapong Fupinwong”. Thai Journal of Mathematics 17, no. 3 (December 1, 2019): 829–842. Accessed July 3, 2024. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/929.