1. Discussion of “Unmasking multiple outliers and leverage points” by Rousseeuw and Van Zomeren;Cook;J. Amer. Statist. Assoc.,1990
2. Cook, R.D. and S. Weisberg, Characterizing extrapolations in multiple regression, Tech. Rept. No. 330, School of Statist. Univ. of Minnesota (St. Paul, MN).
3. Theory of Optimal Experiments;Fedorov,1972
4. Algorithms and programs for robust linear regression;Marazzi,1991
5. Robust Regression and Outlier Detection;Rousseeuw,1987