Istiani, Efi, et al. “Identification of Vitamin D Status in Pregnant Women in Terms of Consumption of Foods Containing Vitamin D and Sun Exposure at Pekauman Health Center in Banjarmasin”. International Journal of Health Systems and Medical Sciences, vol. 4, no. 1, Feb. 2025, pp. 89-96, doi:10.51699/ijhsms.v4i1.415.