Kipiani , Ekaterine, and George Kamkamidze. “Study of Risk Factors Affecting HBV Vaccine Efficiency Among Children in Georgia”. Caucasus Journal of Health Sciences and Public Health, vol. 5, no. 2, Apr. 2021, pp. 83-84, https://caucasushealth.ug.edu.ge/index.php/caucasushealth/article/view/405.