1. Bekoeva, D. D. [Neurophysiological analysis of the phenomenon of fixed set]. Candidate's dissertation, 1978.
2. Bzhalava, I. T. [Psychopathology of epilepsy from the standpoint of the psychology of set]. Ibid.
3. [Some features of fixed set in mentally retarded children];E. Gersamiya;Dokl. APN,1960