Mirzayeva, Gulnar, and Vusala Rzayeva. “Analysis Free Oscillations of a Non-Homogeneous Pipe along’s Thickness and Length, Taking into Account the Resistance of the External Environment”. Technology audit and production reserves 5, no. 1(55) (October 30, 2020): 24–27. Accessed April 14, 2024. https://journals.uran.ua/tarp/article/view/213475.