Virutamasen P, Reinprayoon D, Wongwathanavikrom R, Nitichai Y, Nilakarn T, Poomsuwan P. Clinical and Metabolic Study of Triphasic Contraceptive Pill (Triquilar)® . Thai J Obstet Gynaecol [internet]. 1989 Jan. 1 [cited 2026 Sep. 28];1(1):31-8. available from: https://he02.tci-thaijo.org/index.php/tjog/article/view/257917