BERIHUN, Getamesay Biyadgilign; TEFERI, Dereje. Developing an Improved ITSM Framework for Ethio Telecom. Journal of Information Systems and Informatics, [S. l.], v. 3, n. 2, p. 433–455, 2021. DOI: 10.33557/journalisi.v3i2.145. Disponível em: https://journal-isi.org/index.php/isi/article/view/145. Acesso em: 7 mar. 2026.