„Prevalence of Vitamin D Deficiency and Insufficiency Across Trimesters of Pregnancy in Maiduguri, Nigeria: A Cross-Sectional Study“, AJBR, Bd. 24, Nr. 1, S. 53–57, Jan. 2021, Zugegriffen: 25. April 2026. [Online]. Verfügbar unter: https://ojshostng.com/index.php/ajbr/article/view/1689