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doi.org/10.1023/A:1025369525924, hdl.handle.net/1765/63040
Behavior Genetics
Pediatric Psychiatry

van der Valk, J.C, van den Oord, E.J.C.G, Verhulst, F.C, & Boomsma, D.I. (2003). Using shared and unique parental views to study the etiology of 7-year-old twins' internalizing and externalizing problems. Behavior Genetics, 33(4), 409–420. doi:10.1023/A:1025369525924