Natural waves in a spatial viscoelastic cylinder with a radial crackNasriddin Kuldashov, Zafar Boltaev, Mirqosim Xudoyberdiyev, Uktam Juraev and Tulkin RuziyevE3S Web Conf., 417 (2023) 06014DOI: https://doi.org/10.1051/e3sconf/202341706014