YURKO, V. A. Guest Editor’s Letter. Tamkang Journal of Mathematics, [S. l.], v. 42, n. 3, p. 245–245, 2011. DOI: 10.5556/j.tkjm.42.2011.989. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/989. Acesso em: 3 may. 2024.