1. Caldwell PD, Smith DW (1972) The XXY (Klinefelter’s) syndrome in childhood: Detection and treatment. J Pediatr 80:250–258
2. Garcia HO, Borgaonkar DS, Richardson F (1967) XXYY Syndrome in a prepubertal male. Johns Hopkins Med J 121:31–37
3. Gerli M, Migliorini G, Bocchini V, Venti G, Ferrarese R, Donti E, Rosi G (1979) A case of complete testicular feminisation and 47,XXY karyotype. J Med Genet 16:480–483
4. Gleispach H, Glatzl J (1969) Hormonuntersuchungen bei Kindern mit Klinefelter-Syndrom. Wien Klin Wochenschr 81:811–815
5. Illig R, Tolksdorf M, Mürset G, Prader A (1975) LH and FSH response to synthetic LH-RH in children and adolescents with Turner’s and Klinefelter’s syndrome. Helv Paediatr Acta 30:221–231