Hussain, A. S., M. S. Sulaiman, S. M. Hussein, E. A. Az-Zo’bi, and M. Tashtoush. “Advanced Parameter Estimation for the Gompertz-Makeham Process: A Comparative Study of MMLE, PSO, CS, and Bayesian Methods”. Statistics, Optimization & Information Computing, Vol. 13, no. 6, Mar. 2025, pp. 2316-38, doi:10.19139/soic-2310-5070-2167.