**[AUS]**-
Louis Auslander.

Bieberbach's theorem on space groups and discrete uniform subgroups of lie groups.

*Ann. of Math*, 71(3):579--590, 1960. **[KD]**-
Karel Dekimpe.

*Almost-Bieberbach Groups: Affine and Polynomial Structures*, volume 1639 of*Springer Lecture Notes in Mathematics*.

1996. **[DM]**-
An Descheemaeker and Wim Malfait.

P-localization of relative groups.

*Journal of Pure and Applied Algebra*.

To appear. **[LEE]**-
Kyung Bai Lee.

There are only finitely many infra-nilmanifolds under each nilmanifold.

*Quart. J. Math. Oxford*, 39(2):61--66, 1988.

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GAP 4 manual

November 2000