Applicability of the theory of obligation in the humanitarian aid management of covid19 in Nigeria. Review of Public Administration and Management (ROPAM), [S. l.], v. 12, n. 1, p. 21–24, 2023. Disponível em: https://j.arabianjbmr.com/index.php/ropam/article/view/1169. Acesso em: 17 aug. 2026.