​Dam M, Gram L, Penry JK, editors. Clinical trials in epilepsy: methods and results. New York: Raven Press, 1981.

Jacobsen B, Schulsinger F. The Danish adoption register. In: Mednick SA, Baert AE, editors. Prospective longitudinal research: an empirical basis for the primary prevention of psychosocial disorders. London: Oxford University Press, 1981: 225-230.

Knop J, Angelo H, Christensen JM. Is the role of acetaldehyde in alcoholism based on an analytical artefact? Lancet 1981; ii:102.

Knop J, Fischer A. Duodenal ulcer, suicide, psychopathology and alcoholism. Acta Psychiatr Scand 1981; 63:346-355.

Parnas J, Mednick SA, Moffitt TE. Perinatal complications and adult schizophrenia. Trends in NeuroSciences 1981; 4:262-264.

Schulsinger F, Mednick SA, Knop J. Longitudinal research. Methods and uses in behavioral science. Boston: Martinus Nijhoff Publishing, 1981.

Schulsinger F, Mednick SA. Implications from the first 18 years of a prospective study on children at high risk for schizophrenia. In: Huber G, editor. Schizophrenie. Stand und Entwicklungstendenzen der Forschung. Stuttgart-New York: Schattauer Verlag, 1981: 167-184.

Teasdale TW, Owen DR. Social class correlations among separately adopted siblings and unrelated individuals adopted together. Behav Genet 1981;11:577-588.

Walker EF, Cudeck R, Mednick SA, Schulsinger F. Effects of parental absence and institutionalization on the development of clinical symptoms in high-risk children. Acta Psychiatr Scand 1981; 63:95-109.