1. A female with the 48, XXXX karyotype;Berkeley;Journal of Medical Genetics,1970
2. Syndrome 48.XXXX in una bambina di un anno;Borzani;Minerva Pediatrica,1982
3. An XXXX sex chromosome complex in two mentally defective females;Carr;Canadian Medical Association Journal,1961
4. Le syndrome XXXX;Grouchy;Archives françaises de pédiatne. (Suppl.),1979
5. Feeblemindedness and XXXX karyotype;Cagno;Journal of Mental Deficiency Research,1968