1. Cruickshank, D. W. J. (1965)Computing Methods in Crystallography, J. S. Rollett, ed. (Pergamon Press, New York), 112?116.
2. Report ORNL-3794;C. K. Johnson,1965
3. Koch, M. H. J., De Ranter, C. J., Rolies, M., and Dideberg, O. (1976)Acta Cryst. B 32, 2529?2531.
4. Overbeek, A. R., van der Putten, N., Olthof, G. J., and Schenk, H. (1977) Manual Simpel, Amsterdam.
5. Peeters, O. M., Blaton, N. M., and De Ranter, C. J. (1979)Acta Cryst. B 35, 999?1001.