Kołodziejczyk-Nowotarska, Alicja, Renata Bokiniec, and Joanna Seliga-Siwecka. “Benefits of Prenatal and Postnatal Vitamin D Supplementation”. Journal of Medical Science 90, no. 1 (March 30, 2021): e498. Accessed April 9, 2025. https://jms.ump.edu.pl/index.php/JMS/article/view/498.