KARAKOLEV, Rumen; KOYNARSKI, Tsvetoslav; PETROVA, Reneta; PETROVA-TSENIN, Preslava. INFLUENCE OF THE IMMUNOMODULATOR "AVIGEN" ON THE NATURAL RESISTANCE OF ROSS HYBRID BROILER. TRADITION AND MODERNITY IN VETERINARY MEDICINE, [S. l.], v. 6, n. 2, p. 95–103, 2021. Disponível em: https://scij-tmvm.com/index.php/pub/article/view/160. Acesso em: 6 aug. 2026.