“Prevalence of Vitamin D Deficiency and Insufficiency Across Trimesters of Pregnancy in Maiduguri, Nigeria: A Cross-Sectional Study”, AJBR, ج 24, ش 1, صص 53–57, ژانویه 2021, دسترسی: 5 آوریل 2026. [آنلاین]. قابل دسترس در: https://ojshostng.com/index.php/ajbr/article/view/1689