1. Angelman, H. (1965). “Puppet” children: A report on three cases. Developmental Medicine and Child Neurology, 7, 681–683.
2. Butler, M.G. (1990). Prader-Willi syndrome: Current understanding of cause and diagnosis. American Journal of Genetics, 35, 319–332.
3. Butler, M.G., & Palmar, C.G. (1983). Parental origin of chromosome 15 deletion in Prader-Willi syndrome. Lancet, 1, 285–286.
4. Cassidy, S.B., Lai, L.W., Erickson, R.P., Magnuson, I., Thomas, E., Gendron, R., & Herrmann, J. (1992). Trisomy 15 with loss of the paternal 15 as a cause of Prader-Willi syndrome due to maternal disomy. American Journal of Human Genetics, 51, 701–708.
5. Clayton-Smith, J., & Pembrey, M.E. (1992). Angelman syndrome. Journal of Medical Genetics, 29, 412–415.