Mubeen, Asifa, Nasir Jamal, Muhammad Hanif, and Usman Shahzad. “Modified Ridge Regression Estimator With the Application of Peanut Production in Pakistan”. Asian Journal of Advanced Research and Reports 7, no. 2 (November 30, 2019): 1-8. Accessed January 23, 2020. http://journalajarr.com/index.php/AJARR/article/view/30172.