CHAWINSON, S.; KOCHETKOW, A. On the disappearance of the singularities of analytic functions. Lithuanian Mathematical Journal, [S. l.], v. 9, n. 1, p. 181–192, 1969. DOI: 10.15388/LMJ.1969.20745. Disponível em: https://www.zurnalai.vu.lt/LMJ/article/view/20745. Acesso em: 8 jun. 2025.