Pediatric Neurology
Psych Annals 2:1, , 1972
The Cornelia de Lange Syndrome
J Pediatr 63:1000-1020, Ptacek,L.J., 1963
Prader-Willi-Syndrome, In Endocrine & Genetic Diseases of Childhood & Adolescence
(Ed) , 1975. W. B. Saunders Co, p, Gardner,L.I., 1975