BORUCKA , Jadwiga. Methods of Handling Tied Events in the Cox Proportional Hazard Model. Studia Oeconomica Posnaniensia, Poznan, Polska, v. 2, n. 2, p. 91–106, 2014. DOI: 10.18559/kthq0v56. Disponível em: https://journals.ue.poznan.pl/soep/article/view/3201. Acesso em: 3 sep. 2026.