Griffiths AJF, Miller JH, Suzuki DT, Lewontin RC, Gelbart WM. "Aneuploidy." An Introduction to Genetic Analysis. W.H. Freeman and Company: 2000. <http://www.ncbi.nlm.nih.gov/books/bv.fcgi?rid=iga.section.3080#3088>

Parsons, P.A. 1964. Parental age and the offspring. The Quarterly Review 39(3): 258-275. <http://www.jstor.org.nuncio.cofc.edu/stable/2820036?seq=2&cookieSet=1>

Burson J., Barringer B. "Klinefelter's Syndrome" The American Journal of Nursing, Vol. 98, No. 12 (Dec., 1998), http://www.jstor.org.nuncio.cofc.edu/stable/3471709

Bischoff F., Iitsuka Y., Bock A., Nguyen D., Samango-Sprouse C., Simpson J. "Evidence of skewed X-chromosome inactivation in 47,XXY and 48,XXYY Klinefelter patients" American Journal of Medical Genetics Part A, Volume 98 Issue 1.15 Dec 2000. pp 25-31. http://www3.interscience.wiley.com/journal/76502749/abstract?CRETRY=1&SRETRY=0

Wikström, A. Painter, J. Raivio, T. Aittomäki, K. Dunkel, L. "Genetic features of the X chromosome affect pubertal development and testicular degeneration in adolescent boys with Klinefelter syndrome" Clinical Endocrinology; Jul2006, Vol. 65 Issue 1, p92-97. http://web.ebscohost.com.nuncio.cofc.edu/ehost/detail?vid=1&hid=115&sid=06605e96-c667-410e-adb4-9482a3f6b35e%40sessionmgr104&bdata=JnNpdGU9ZWhvc3QtbGl2ZQ%3d%3d#db=hch&AN=21217183

Vawter M., Harvey P., DeLisi L. "Dysregulation of X-Linked Gene Expression in Klinefelter’s Syndrome and Association With Verbal Cognition"American Journal of Medical Genetics Part B. Volume 144B Issue 6. pp728-734. 2007 March 08. http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=2094046

Gilbert S, Sharp P. "Promoter- specific hypoacetylation of X-inactivated genes" PNAS. Volume 96 Issue 24. 1999. http://www.pnas.org/content/96/24/13825.full

Zinn A, Ramos P, Elder F, Kowal K, Samango-Spouse C, Ross J. "Androgen Recpeptor CAGn Repeat Length Influences Phenotype of 47, XXY (Klinefelter) Syndrome" The Journal of Clinical Endocrinology & Metabolism. 2005.  Vol. 90, No. 9 5041-5046. http://jcem.endojournals.org/cgi/content/full/90/9/5041#T2

Lim H, Chen H, Mcrbride S, Dunning AM, Nixon R, Hughes IA, Hawkins JR. "Longer Polyglutamine tracts are associated with moderate to severe undermasculinized genitalia in XY males" Human Molecular Genetics. 2000. Volume 9 Issue 5 pp 829-834. http://hmg.oxfordjournals.org/cgi/content/full/9/5/829