WEI, S. W. The balance between existence and nonexistence theorems in differential geometry. Tamkang Journal of Mathematics, [S. l.], v. 32, n. 1, p. 61–88, 2001. DOI: 10.5556/j.tkjm.32.2001.370. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/370. Acesso em: 8 may. 2024.