Mutlu, N., Esra, H., Begum, A., Fatma, D., Arzu, Y., Yalcin, H., Fatih, K., & Selahattin, K. (2015). Relation of maternal vitamin D status with gestational diabetes mellitus and perinatal outcome. African Health Sciences, 15(2), 523–531. https://doi.org/10.4314/ahs.v15i2.27