Mladenov, Galabin, and Teodora P. Popova. “PROBLEMATIC INFECTIONS IN PARROTS – STREPTOCOCCAL AND ENTEROCOCCAL INFECTIONS, DIAGNOSTICS ANS CONTROL”. TRADITION AND MODERNITY IN VETERINARY MEDICINE, vol. 5, no. 1, June 2020, pp. 65-72, doi:10.5281/zenodo.3675928.