Ivanova, A., Tsvetkova, N., Harizanov, R., & Borisova, R. (2019). STUDY OF THE DISTRIBUTION OF PNEUMOCYSTOSIS IN BULGARIA BETWEEN SEPTEMBER 2017 AND APRIL 2019 BY USING REAL- TIME PCR. PROBLEMS of Infectious and Parasitic Diseases, 47(2), 24-27. https://doi.org/10.58395/pipd.v47i2.8