Kannayan, L., N. Shamim, A. Arpana, M. K. Mudigubba, and S. B. “Association of Serum Homocysteine Levels With the Development of Preeclampsia”. Nepal Journal of Obstetrics and Gynaecology, vol. 15, no. 2, Nov. 2020, doi:10.3126/njog.v15i2.32896.