1. Crystallographic Groups of Four-dimensional Space;Brown,1978
2. International Tables for Crystallography, Vol. A. Space-group Symmetry (Ed. T. Hahn). Reidel, Dordrecht (1983).
3. The 80 Diperiodic Groups in Three Dimensions;Wood,1964
4. Shubnikovskiie Gruppy;Koptsik,1966
5. Irreducible Representations of the Space Groups;Kovalev,1965