Syahrial, Syahrial, et al. “Comparison of Vitamin D Intake and Ultraviolet Light Exposure in Pre and Postmenopausal Women in the Elderly Pandemic Period”. Jurnal Gizi Dan Dietetik Indonesia (Indonesian Journal of Nutrition and Dietetics), vol. 10, no. 1, Dec. 2022, pp. 22-29, doi:10.21927/ijnd.2022.10(1).22-29.