Ivanov, Daniel, Tencho Tenev, and Elica Golkocheva-Markova. (2020) 2020. “PREVALENCE OF ANTI-HBC IN HBSAG-NEGATIVE POPULATION: SCREENING OF PATIENTS WITH UNSPECIFIED ACUTE HEPATITIS AND REVIEW OF THE LITERATURE”. PROBLEMS of Infectious and Parasitic Diseases 48 (1):33-38. https://pipd.ncipd.org/index.php/pipd/article/view/31.