Yahya Algamal, Z., زکریا, Q. Abdul kareem, and قمر. “Generalized Ridge Estimator Shrinkage Estimation Based on Particle Swarm Optimization Algorithm”. IRAQI JOURNAL OF STATISTICAL SCIENCES, vol. 17, no. 2, June 2025, pp. 26-35, https://rjps.uomosul.edu.iq/index.php/stats/article/view/20766.