Ghebreyohanes, G., and A. Okbaghebriel. “Degree of Abortion Case Load Admitted to National and Zoba (region) Maternity Care Referral Centers in Eritrea (2006-2010)”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 20, no. 2, Feb. 2015, pp. 97-110, https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/3477.