Gottesman, I. I., & Bertelsen, A. (1989a). Confirming unexpressed genotypes in schizophrenia. Risks in offspring of Fischer's Danish identical and fraternal twins. Archives of General Psychiatry, 46, 867–872.
Gottesman, I. I., & Bertelsen, A. (1989b). Dual mating studies in psychiatry – Offspring of inpatients with examples from reactive (psychogenic) psychoses. International Review of Psychiatry, 1, 287–296.
Gottesman, I. I., Laursen, T. M., Bertelsen, A., & Mortensen, P. B. (2010). Severe mental disorders in offspring with 2 psychiatrically ill parents. Archives of General Psychiatry, 67, 252–257.
Kläning, U., Trumbetta, S. L., Gottesman, I. I., Skytthe, A., Kyvik, K. O., & Bertelsen, A. (2016). A Danish twin study of schizophrenia liability: Investigation from interviewed twins for genetic links to affective psychoses and for cross-cohort comparisons. Behavior Genetics, 46, 193– 204.