1. See Bibliography, James (1958) International tables for X-ray crystallography, vol C. 2nd edn. (1999)
2. Zachariasen WH (1967) Acta Crystallogr 23:558
3. Busing WR, Levy HA (1957) Acta Crystallogr 10:180
4. Blessing RH (1995) Acta Crystallogr A51:33; idem J Appl Crystallogr 30:421 (1997)
5. Tickle IJ (1975) Acta Crystallogr B31:329