Kotsyumbas, G.I., Zhyla, M.I., Tyshkivska, A.M., Kalinina, O.S., Khmil, E.P., Shkil, M.I., Mysiv, O.V. and Tyshkivsky, M.Y. 2023. Structural-functional changes in the proventriculus of poultry infected with transmissive viral proventriculitis . Regulatory Mechanisms in Biosystems. 14, 2 (Apr. 2023), 173-179. DOI:https://doi.org/10.15421/022326.