X. Breakefield (ed.): Neurogenetics. Genetic approaches to the nervous
system. Elsevier 1979.

4899 John Horgan: Gene und Verhalten. Spektrum 1993/8, 76-83.

D. Jolly a.o.: Isolation and characterization of a full length expressible
cDNA for human HGPRT. Proc. Nat. Ac. Sci. USA 80 (1983), 477-481.

11760 Howard Lenhoff/Paul Wang/Frank Greenberg/Ursula Bellugi: Williams-
Beuren-Syndrom und Hirnfunktionen. Spektrum 1998/2, 62-68.

H. Meltzer (ed.): Psychopharmacology. The third generation of progress.
Raven 1987.

A. Miller/D. Jolly/T. Friedman/I. Verma: A transmissible retrovirus expressing
human HGPRT. Gene transfer cells obtained from humans deficient in HGPRT.
Proc. Nat. Ac. Sci. USA 80 (1983), 4709-4713.

R. Mullen/K. Herrup: Chimeric analysis of mouse cerebellar mutants.
In Breakefield 1979.

R. Rosenberg (ed.): Comprehensive neurology. Raven Press 1991.

R. Rosenberg/J. Pettegrew: Genetic neurological diseases.
In Rosenberg 1991, 23-95.

K. Sandhoff/U. Andreae/H. Jatzkewitz: Deficient hexosaminidase activity
in an exceptional case of Tay-Sachs disease with additional storage of
kidney globoside in visceral organs. Life Sci. 7 (1968), 283-288.

M. Schwartz a.o.: Down's syndrome in adults. Brain metabolism.
Science 221 (1983), 781-783.

S. Stein/M. Morrison: The molecular biology of Lesch-Nyhan syndrome.
Trends Neurosci. 8 (1985), 148-150.

9501 Hubert Rehm: Ein ungewo''hnlicher Gendefekt als Ursache eines
erblichen Krampfleidens. Spektrum 1995/10, 22-26.

D. Wong/R. Ciaranello: Molecular biological approaches to mental retardation.
In Meltzer 1987, 681-721.