1. Barnett, V. and Lewis, T. (1984). Outliers in Statistical Data, 2nd ed., Wiley, New York.
2. Beckman, R. J. and Cook, R. D. (1983). Outliers, Technometrics, 25, 119–149.
3. Butler, R. W. (1981). The admissible Bayes character of subset selection techniques involved in variable selection, outlier detection, and slippage problems, Ann. Statist., 9, 960–973.
4. Butler, R. (1983). Outlier discordancy tests in the normal linear model, J. Joy. Statist. Soc. Ser. B.
45, 120–132.
5. Cochran, W. G. (1941). The distribution of the largest of a set of estimated variances as a fraction of their total, Ann. Eugenics, 11, 47–52.