Goujgoulova, G. and Stoimenov, G. 2022. Avian Avulavirus 1 Outbreaks in Bulgaria During 2016 and 2017. TRADITION AND MODERNITY IN VETERINARY MEDICINE. 7, 2 (Nov. 2022), 36–43. DOI:https://doi.org/10.5281/zenodo.7704069.