Gradaščević Gubaljević, J., and A. Čaušević. “Monitoring Changes in Serum 8-Isoprostane Concentration As a Possible Marker of Oxidative Stress in Pregnancy”. Journal of Health Sciences, vol. 3, no. 3, Dec. 2013, pp. 227-31, doi:10.17532/jhsci.2013.112.