KushchМ. М., I. Y. Lavrova, FesenkoІ. А., MiroshnikovaО. S., LiakhovichL. М., L. L. Kushch, and ByrkaО. V. 2023. “Age Features of the Microscopic Structure of the Intestines of the Budgerigar (Melopsittacus Undulatus) ”. Regulatory Mechanisms in Biosystems 14 (2), 304-11. https://doi.org/10.15421/022345.