SESSA, S.; SINGH, S. P. APPLICATIONS OF THE KKM-PRINCIPLE TO PROLLA TYPE THEOREMS. Tamkang Journal of Mathematics, [S. l.], v. 23, n. 4, p. 279–287, 1992. DOI: 10.5556/j.tkjm.23.1992.4551. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4551. Acesso em: 5 oct. 2022.