Zieliński, Marcin. “On Non-Equivalent Metrics on a Uncountable Set”. Annales Universitatis Paedagogicae Cracoviensis | Studia ad Didacticam Mathematicae Pertinentia 9, no. 1 (June 1, 2018): 139–152. Accessed November 21, 2024. https://didacticammath.uken.krakow.pl/article/view/4319.