1. Patanjali M. Yoga Sūtras (Shearer A. Trans. Effortless being). The Yoga Sūtras of Patanjali. London: Crown Publishing; 2010.
2. Isvarakrsna, (Thomas H. Tran.) SankhyaKarika. Philadelphia: Wentworth; 2016.
3. Jung CG. The collected works of C.G. Jung: psychology and religion. New York: Pantheon Books, U. Minnesota; 1989.
4. Weiss E. Sigmund Freud as a consultant – recollections of a pioneer in psychoanalysis. New York: Transaction Publishers; 1991.
5. Selye H. The stress of life. New York: MacGraw-Hill; 1984.