«Prevalence of Vitamin D Deficiency and Insufficiency Across Trimesters of Pregnancy in Maiduguri, Nigeria: A Cross-Sectional Study», AJBR, vol. 24, núm. 1, p. 53–57, gen. 2021, Consulta: 5 abril 2026. [En línia]. Disponible a: https://ojshostng.com/index.php/ajbr/article/view/1689