Mammad oglu, Elchin Guseynov. “Prevalence of Polymorphism (-174 G C) of IL-6 Gene in Patients With Acute Brucellosis and Hepatobiliary System Damage”. Journal of Education, Health and Sport, vol. 9, no. 4, July 2019, pp. 618-26, https://apcz.umk.pl/JEHS/article/view/7218.