1. Freedman A. M. , and Kaplan H. I. (1967). Comprehensive Textbook of Psychiatry, New York, p. 925.
2. Capstick N. (1970) Paper read at the Seventh Congress of the Collegium Internationale Neuro-Psycho-pharmacologicum.
3. Guyotat J. , Favre-Tissot M. , and Marie-Gardine M. (1968). C.R. Congr. Psychiat. Neurol., Dijon, 1967, Masson, Paris. 717–21.