Fasulkov, Ivan, Yordanka Ilieva, Pencho Penchev, Karadaev Мanol, Ivanova Boyаna, Radena Nenova, and Nasko Vasilev. “Еarly Pregnancy Diagnosis in Bulgarian Murrah Buffaloes by Measurement of Pregnancy-Associated Glycoproteins (PAGs) in Blood Serum and Milk ”. Acta Scientiae Veterinariae 53 (December 3, 2025). Accessed August 11, 2026. https://seer.ufrgs.br/index.php/ActaScientiaeVeterinariae/article/view/148745.