Neshovska, H. et al. 2022. COMPARATIVE STUDY OF THE HEAVY METAL LEVELS IN GREY MULLET (MUGIL CEPHALUS) FROM THE NORTHERN AND SOUTHERN BULGARIAN BLACK SEA COAST. TRADITION AND MODERNITY IN VETERINARY MEDICINE. 7, 1 (Jun. 2022), 66–69. DOI:https://doi.org/10.5281/zenodo.6376308.