Sivik, T., Delimar, N., & Schoenfeld, R. (1999). Construct validity of the Sivik Psychosomaticism Test and test of operational style: correlations with four Minnesota Multiphasic Personality Inventory (MMPI) subscales. Integrative Physiological & Behavioral Science, 34(2), 79–84. http://www.transactionpub.com/cgi-bin/transactionpublishers.storefront