S. Yordanova, A. Baykova, Y. Atanasova, Y. Todorova, and E. Bachiyska, “ISONIAZID - MONORESISTANT TUBERCULOSIS IN BULGARIA”, Probl Infect Parasit Dis, vol. 48, no. 1, pp. 21–24, May 2020, doi: 10.58395/pipd.v48i1.29.