KushchМ. М., Lavrova, I. Y., FesenkoІ. А., MiroshnikovaО. S., LiakhovichL. М., Kushch, L. L. and ByrkaО. V. (2023) “Age features of the microscopic structure of the intestines of the budgerigar (Melopsittacus undulatus) ”, Regulatory Mechanisms in Biosystems, 14(2), pp. 304-311. doi: 10.15421/022345.