1. Azerinsky, E. (1971). Rapid eye movement density and pattern in the sleep of normal young adults. Psychophysiology, 8, 361–375.
2. Chandler, D. (2002). Semiotics: The basics. New York: Routledge.
3. Clyde, D. (1963). Manual for the clyde-mood scale Miami: Biometric Laboratory, University of Florida.
4. Fox, R., Kramer, M., Baldridge, B., Whitman, R., & Ornstein, P. (1968). The experimenter variable in dream research. Diseases of the Nervous System, 29, 698–701.
5. Freud, S. (1955). The interpretation of dreams. (1st ed.). New York: Basic Books.