R. Saengsiriwudh, P. Yapan, T. Wataganara, S. Surasereewong, and T. R. Pinnington, “The Association Between Low Pregnancy-Associated Plasma Protein-A levels and Adverse Pregnancy Outcomes”, Thai J Obstet Gynaecol, vol. 34, no. 1, pp. 70–81, Jan. 2026.