On nonlinear dynamics of COVID-19 disease model corresponding to nonsingular fractional order derivative. - Muhammad Arfan; Maha M. A. Lashin; Pongsakorn Sunthrayuth; Kamal Shah; Aman Ullah; Kulpash Iskakova; M. R. Gorji; Thabet Abdeljawad (Medical Biol. Eng. Comput., 2022)