El-Doakly، W. S. H. (2024). A Comparative Study of some Two-Parameter Ridge-Type and Liu-Type Estimators to Combat Multicollinearity Problem in Regression Models: Simulation and Application. المجلة العلمية للاقتصاد والتجارة، ع4 ، 105 - 136. مسترجع من http://search.mandumah.com/Record/1530486
El-Doakly، Wael Saad Hsanein. "A Comparative Study of Some Two-Parameter Ridge-Type and Liu-Type Estimators to Combat Multicollinearity Problem in Regression Models: Simulation and Application." المجلة العلمية للاقتصاد والتجارة ع4 (2024): 105 - 136. مسترجع من http://search.mandumah.com/Record/1530486