Learning Disability
Lancet 362:811-821, Gillberg,C.&Soderstrom,H., 2003
Prader-Willi and Angelman Syndromes
Medicine 77:140-151, Cassidy,S.B.&Schwartz,S., 1998
Prader-Willi-Syndrome, In Endocrine & Genetic Diseases of Childhood & Adolescence
(Ed) , 1975. W. B. Saunders Co, p, Gardner,L.I., 1975