Team, Support. “A Note on Homotopic Invariance for Endpoints of Multi-Valued Contractive Mappings : Bancha Panyanak”. Thai Journal of Mathematics 18, no. 2 (June 1, 2020): 669–675. Accessed May 2, 2024. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/1025.