Fasulkov, Ivan, Manol Karadaev, Nasko Vasilev, Martin Nikolov, and Tsvetelin Nonov. “THREE-DIMENSIONAL ULTRASONOGRAPHY OF THE MAMMARY GLAND IN LACTATING COWS”. TRADITION AND MODERNITY IN VETERINARY MEDICINE 3, no. 2 (November 23, 2018): 109–113. Accessed August 6, 2026. https://www.scij-tmvm.com/index.php/pub/article/view/59.