Ghebreyesus, T. A; Haile, M.; Witten, K. H; Getachew, A.; Yohannes, A. M; Yohannes, M.; Teklehaimanot, H. D; Lindsay, S. W; Byass, P. (11 September 1999). "Incidence of malaria among children living near dams in northern Ethiopia: community based incidence survey". BMJ. 319 (7211): 663–666. doi:10.1136/bmj.319.7211.663. PMID10480820.
Ghebreyesus, T. A; Haile, M.; Witten, K. H; Getachew, A.; Yohannes, A. M; Yohannes, M.; Teklehaimanot, H. D; Lindsay, S. W; Byass, P. (11 September 1999). "Incidence of malaria among children living near dams in northern Ethiopia: community based incidence survey". BMJ. 319 (7211): 663–666. doi:10.1136/bmj.319.7211.663. PMID10480820.