Singh, S., M. Dey, S. Singh, and S. Sasidharan. “Biochemical Markers As Predictor of Preterm Labor - and Their Clinical Relevance - the Current Status”. Gynecology Obstetrics &Amp; Reproductive Medicine, vol. 28, no. 3, Dec. 2022, pp. 282-9, doi:10.21613/GORM.2020.1108.