Palinoan, M., Kaeng, J. J. and Suparman, E. (2018) “Levels of 25 Hydroxyvitamin D in Normotensive Pregnancy and Severe Preeclampsia”, Indonesian Journal of Obstetrics and Gynecology, 6(2), pp. 78–83. doi: 10.32771/inajog.v6i2.765.