Videnova, Mihaela, et al. “RETROSPECTIVE ANALYSIS OF TAENIASIS IN BULGARIA CAUSED BY THE BEEF TAPEWORM FOR THE PERIOD 2008-2017”. PROBLEMS of Infectious and Parasitic Diseases, vol. 48, no. 1, May 2020, pp. 39-44, https://doi.org/10.58395/pipd.v48i1.32.