KARAKOLEV, R.; KOYNARSKI, T.; PETROVA-TSENIN, P.; PETROVA, R. Influence of "``Avigen Duck" Immunomodulator on Some Humoral Factors of Non-specific Protection in White Pekin Ducks Parents. Proceedings of the Bulgarian Academy of Sciences, Sofia, Bulgaria, v. 76, n. 6, p. 970–976, 2023. DOI: 10.7546/CRABS.2023.06.18. Disponível em: https://proceedings.bas.bg/index.php/cr/article/view/341. Acesso em: 13 apr. 2024.