C. I, Ejiofor; E. UKO, Okon. Universal Electronic Student Course Registration Model (U-ESCRM). American Scientific Research Journal for Engineering, Technology, and Sciences, Jordan, v. 40, n. 1, p. 1–5, 2018. Disponível em: https://www.asrjetsjournal.org/American_Scientific_Journal/article/view/3801. Acesso em: 14 oct. 2025.