References

1. Altomare A., Cascarano G., Giacovazzo C. and Guagliardi A.
   (1993). J. Appl. Cryst. 26, 343-350
2. Altomare A., Cascarano G., Giacovazzo C. and Viterbo D.(1991).
   Acta Cryst. A47, 744-748.
3. Baggio R., Woolfson M.M., Declerq J.P. and Germain G.(1978).
   Acta Cryst. A34, 883-892.
4. Burla M.C.,Cascarano G.,Fares V.,Giacovazzo C.,Polidori G.
   and Spagna R. (1989). Acta Cryst. A45, 781-786
5. Burla M.C., Cascarano G. and Giacovazzo C. (1992). Acta
   Cryst. A48, 906-912.
6. Burla M.C.,Giacovazzo C. and Polidori G.(1987). Acta Cryst.
   A43, 797-802.
7. Burla M.C.,Giacovazzo C. and Polidori G.(1989). Acta Cryst.
   A45, 99-104.
8. Burla  M.C., Nunzi  A.,  Giacovazzo  C. and  Polidori  G.
   (1981), Acta Cryst. A37, 677-684.
9. Burla M.C.,  Cascarano G.,  Giacovazzo C.,  Nunzi A.  and
   Polidori G.  (1987), Acta Cryst. A43, 370-374.
10. Burzlaff H. and  Hountas A. (1982),  J. Appl.  Cryst. 15,
    464-467.
11. Camalli M.,Giacovazzo C. and Spagna R. (1985). Acta Cryst.
    A41, 605-613.
12. Cascarano G., Giacovazzo C. and Guagliardi A. (1991). Acta
    Cryst. A47, 698-702.
13. Cascarano G., Giacovazzo C. and Guagliardi A. (1992). Acta
    Cryst. A48, 859-865.
14. Cascarano G., Giacovazzo C. and Luic' M.(1988a). Acta Cryst.
    A44, 176-183.
15. Cascarano G., Giacovazzo C. and Luic' M.(1988). Acta Cryst.
    A44, 183-188
16. Cascarano G., Giacovazzo C.  and  Viterbo D.(1987). Acta
    Cryst. A43, 22-29.
17. Cascarano G., Giacovazzo C.,  Calabrese G., Burla M.C.,
    Nunzi  A.,  Polidori   G.  and  Viterbo  D.   (1984),  Z.
    Kristallogr., 167, 34-47.
18. Cascarano G., Giacovazzo  C., Camalli  M., Spagna  R.,
    Burla M.C., Nunzi A. and Polidori G. (1984), Acta Cryst.
    A40, 278-283.
19. Cascarano G., Giacovazzo C.,  Burla M.C.,  Nunzi A.  and
    Polidori G.  (1984), Acta Cryst.  A40, 389-394.
20. Cochran W.(1955). Acta Cryst. 8, 473-478.
21. Fan Haifu, Yao Jia-Xing and Qian Jin-zi (1988). Acta Cryst.
    A44, 688-691.
22. Germain  G.,  Main  P. and  Woolfson  M.M.  (1970),  Acta
    Cryst. B26, 274-285.
23. Giacovazzo C. (1976), Acta Cryst. A32, 958-966.
24. Giacovazzo C. (1977), Acta Cryst. A33, 933-944.
25. Giacovazzo C. (1978), Acta Cryst. A34, 562-574.
26. Giacovazzo C. (1979), Acta Cryst. A35, 757-764.
27. Giacovazzo C. (1980), Acta Cryst. A36, 362-372.
28. Giacovazzo C. (1983), Acta Cryst. A39, 685-692.
29. Giacovazzo C. (1993). Z. f. Kristall., in press.
30. Giacovazzo C., Burla M.C. and Cascarano G. (1992).
    Acta Cryst. A48, 901-906.
31. Giacovazzo C., Spagna  R., Vickovic  I.  and Viterbo  D.
    (1979), Acta Cryst. A35, 401-412.
32. Main P. (1977), Acta Cryst. A33, 750-757.
33. Main P. (1978), Acta Cryst. A34, 31-38.
34. Main P., Fiske  S.J., Hull S.E., Lessinger  L., Germain
    G., Declercq J.P. and Woolfson  M.M. (1980) - MULTAN80, a
    system of computer programs  for the automatic solution
    of  crystal structures  from x-ray  diffraction data  -
    Univ. of York, England.
35. White P.S. and Woolfson M.M. (1975), Acta Cryst. A31,53-56.
36. Ten Eick,L.F. (1977). Acta Cryst. A33, 486-492.