1. Abbey, S., 1983, Studies in ?Standard Samples? of Silicate Rocks and Minerals, 1969?1982: Geol. Surv. Can. Paper, v. 83, no. 15, 114 p.
2. Andrews, R. W.; Bickel, P. J.; Hampel, F. R.; Huber, P. J.; Rogers, W. H.; and Tukey, J. W.; 1972, Robust Estimates of Location: Princeton University Press, New Jersey, 373 p.
3. Barnett, V. and Lewis, T., 1984, Outliers in Statistical Data: 2nd ed.: John Wiley & Sons, Chichester, 463 p.
4. Beckman, R. J. and Cook, R. D., 1983, Outlier ...s: Technometrics, v. 25, p. 119?149.
5. Chapman, R. P., 1976, Some Consequences of Applying Lognormal Theory to Pseudolognormal Distributions?A Discussion: Math. Geol., v. 8, p. 209?214.