1. V. Vapnik, The Nature of Statistical Learning Theory (Springer-Verlag, Berlin, 2000).
2. Yu. I. Zhuravlev, in Problems of Applied Mathematics and Mechanics (Nauka, Moscow, 1971), pp. 67–74 [in Russian].
3. P. J. Huber, Robust Statistics (Wiley, New York, 1981; Mir, Moscow, 1984).
4. P. J. Rousseeuw, J. Am. Stat. Ass., No. 79, 871–880 (1984).
5. P. J. Rousseeuw and A. M. Leroy, Robust Regression and Outlier Detection (Wiley, New York, 1987).