Ugwuja, Emmanuel I., Boniface N. Ejikeme, Nicholas C. Ugwu, Ndudim C. Obeka, Emmanuel I. Akubugwo, and Onyechi Obidoa. 2010. “Comparison of Plasma Copper, Iron and Zinc Levels in Hypertensive and Non-Hypertensive Pregnant Women in Abakaliki, South Eastern Nigeria”. Pakistan Journal of Nutrition 9 (12): 1136–1140. https://doi.org/10.3923/pjn.2010.1136.1140.