Defrin, D., E. Yerizel, D. Suhaimi, and A. Afriwardi. “The Reactivity Levels of Progesterone, Nitric Oxide and Nuclear Factor Kappa-B on the Serum of Term and Post-Term Pregnancy, Clinical Study in Padang, West Sumatera, Indonesia”. Open Access Macedonian Journal of Medical Sciences, vol. 7, no. 11, May 2019, pp. 1729-32, doi:10.3889/oamjms.2019.351.