Laminar unsteady flow of a viscoelastic liquid in a flat channel Zakhid Shukurov, Kuralboy Navruzov, Mukhammadi Turayev and Nabijan Abdukarimov E3S Web Conf., 587 (2024) 01014 Published online: 07 November 2024 DOI: 10.1051/e3sconf/202458701014