Raji-allah, Abdelali, and Hamad Talibi Alaoui. 2026. “RETRACTED: Dynamics of a Delayed Epidemic Model With Beddington-Deangelis Incidence Rate and a Constant Infectious Period”. Journal of Applied Nonlinear Dynamics 9 (4): 703-3. https://doi.org/10.5890/JAND.2020.12.012.