DARKE, Peta; SHANKS, Graeme. Defining System Requirements: a critical assessment of the Niam conceptual design procedure. Australasian Journal of Information Systems, Australia, v. 2, n. 2, 1995. DOI: 10.3127/ajis.v2i2.403. Disponível em: https://ajis.aaisnet.org/index.php/ajis/article/view/403. Acesso em: 7 dec. 2025.