1. F. S. Batah, and S. D. Gore, Ridge regression estimator: Combining unbiased and ordinary ridge regression methods of estimation. Surveys in Mathematics and its Applications, 4, 99–109. (2009).
2. F. S. Batah, T.V. Ramanathan, and S. D. Gore, The Efficiency of Modified Jackknifed Ridge type Regression Estimators: A comparison. Surveys in Mathematics and its Applications, 3, 111–122. (2008).
3. Ridge regression:some simulations
4. Mean squared error matrix comparisons between biased estimators — An overview of recent results
5. Using improved estimation strategies to combat multicollinearity