1. Majerz, I.; Malarski, Z.; Lis, T.Bull. Pol. Ac. Sci. Chem. 1989,37, 81.
2. Sheldrick, G.M., SHELX86,Program for the solution of crystal structure; Univ. of Gottingen: 1986.
3. Walker, N.; Stuart, D.,Acta Crystallogr. 1983,A39, 158.
4. Syntex XTL/XTLE Structure Determination System, Syntex Analytical Instruments: Cupertino, CA, 1976.
5. International Tables for X-ray Crystallography, Vol. IV; Kynoch Press: Birmingham, 1974.