Galanter. Competing Equalities; Sowell T. Preferential Policies: An International Perspective. N. Y.: Morrow, 1990; Glazer N. Affirmative Discrimination: Ethnic Inequality and Public Policy. Cambridge: Cambridge University Press, 1987; 1st ed., 1975; Horowitz D. Ethnic Groups in Conflict. Berkeley: University of California Press, 1985. P. 653–680.