NDLOVU, B. D.; MELESSE, S. F.; ZEWOTIR, T. A nonparametric vertical model: An application to discrete time competing risks data with missing failure causes. South African Statistical Journal, [S. l.], v. 54, n. 2, p. 231–241, 2020. DOI: 10.37920/sasj.2020.54.2.7. Disponível em: https://www.journals.ac.za/index.php/sasj/article/view/4992. Acesso em: 3 apr. 2026.