IVANOVA, A.; TSVETKOVA, N.; HARIZANOV, R.; BORISOVA, R. 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, v. 47, n. 2, p. 24-27, 30 Dec. 2019.