Kenenbai, G.S., Chomanov, U.C., Omirzhanova, B.B., Tatieva, A.N., Kassymbek, R. and Zhumaliyeva, G. 2022. Processing of beef rumen with ultrasonic waves. Potravinarstvo Slovak Journal of Food Sciences. 16, (Nov. 2022), 810–823. DOI:https://doi.org/10.5219/1794.