Nikoloska, K., I. Malahova- Gjoreska, I. Kaev, and A. Petlickovski. “Increased Level of IL-8 in Amniotic Fluid in Early Second Trimester Linked With Preterm Pregnancies”. Archives of Public Health, vol. 12, no. 1, Feb. 2020, pp. 5-13, doi:10.3889/aph.2020.4472.