# cryst : a GAP 4 package - References

[BBNWZ78]
  H. Brown, R. Bülow, J. Neubüser, H. Wondratschek, and H. Zassenhaus.
  Crystallographic Groups of Four-Dimensional Space.
  John Wiley, New York, 1978.
[EGN97]
  F. G"ahler, B. Eick and W. Nickel.
  Computing maximal subgroups and wyckoff positions of space groups.
  Acta Cryst A 53, 467--474 (1997).
[Hah95]
  T. Hahn, editor.
  International Tables for Crystallography, Volume A, Space-group Symmetry, 4th Edition.
  Kluwer, Dordrecht, 1995.
[Won95]
  H. Wondratschek.
  Introduction to space-group symmetry.
  In Internation Tables for Crystallography, Vol. A Hah95, pages 711--735.

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