Vibrations of Cylindrical Shell Structures Filled With Layered Viscoelastic MaterialIsmoil Safarov, Мuhsin Теshaev, Abdurakhim Marasulov, Tokhir Jurayev and Bahodir RaxmonovE3S Web Conf., 264 (2021) 01027DOI: https://doi.org/10.1051/e3sconf/202126401027