"47,XYY Syndrome." Genetics Home Reference. U.S. National Library of Medicine, 14 Dec. 2015. Web. 18 Dec. 2015.
"Jacobs Syndrome." Symptoms, Diagnosis, Treatments and Causes. 13 Aug. 2015. Web. 18 Dec. 2015
"XYY SYNDROME." DDHealthInfo.org. DDHealth, 11 July 2006. Web. 18 Jan. 2016.
Jamieson, Anne. "Are XYY Males More Prone to Aggressive Behavior than XY Males?" Are XYY Males More Prone to Aggressive Behavior than XY Males. N.p., n.d. Web. 18 Jan. 2016.
Linden, Marry G., and Bruce G. Bender. "Fifty-one Prenatally Diagnosed Children and Adolescents with Sex Chromosome Abnormalities." Wiley Online Library. N.p., 10 Apr. 2002. Web. 24 Jan. 2016.
"Jacobs Syndrome." Symptoms, Diagnosis, Treatments and Causes. 13 Aug. 2015. Web. 18 Dec. 2015
"XYY SYNDROME." DDHealthInfo.org. DDHealth, 11 July 2006. Web. 18 Jan. 2016.
Jamieson, Anne. "Are XYY Males More Prone to Aggressive Behavior than XY Males?" Are XYY Males More Prone to Aggressive Behavior than XY Males. N.p., n.d. Web. 18 Jan. 2016.
Linden, Marry G., and Bruce G. Bender. "Fifty-one Prenatally Diagnosed Children and Adolescents with Sex Chromosome Abnormalities." Wiley Online Library. N.p., 10 Apr. 2002. Web. 24 Jan. 2016.