Carter, J. W., Parnas, J., Cannon, T. D., Schulsinger, F., & Mednick, S. A. (1999). MMPI variables predictive of schizophrenia in the Copenhagen High-Risk Project: a 25-year follow-up. Acta Psychiatrica Scandinavica, 99(6), 432–440. Munksgaard Scientific Journals, US, www.munksgaard.de