Ara Bertran P. La paradoxa de Banach-Tarski i el semigrup de tipus. Butll. Soc. Catalana de Mat. [Internet]. 2020 Sep. 8 [cited 2024 Dec. 22];35(1):5-22. Available from: https://revistes.iec.cat/index.php/BSCM/article/view/107696.003