References
- Arieti , S. 1955 . Interpretation of schizophrenia , New York : Brunner .
- Baddeley , A. D. Some factors influencing the generation of random letter sequences . Paper presented at the London, England, meeting of the Experimental Psychology Society .
- Siegel , S. 1956 . Nonparametric Statistics for the Behavioral Sciences , New York : McGraw-Hill .