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://www.journal-isi.org.adsii.or.id/index.php/isi/article/view/145. Acesso em: 13 mar. 2026.