KO, H.-M.; TAN, K.-K. COINCIDENCE THEOREMS AND MATCHING THEOREMS. Tamkang Journal of Mathematics, [S. l.], v. 23, n. 4, p. 297–309, 1992. DOI: 10.5556/j.tkjm.23.1992.4553. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4553. Acesso em: 5 oct. 2022.