1. Almassy, R. J., Fontecilla-Camps, J. C, Suddath, F. L. & Bugg, C. E. (1983). J. Mol. Biol, 170, 497–522.
2. Blow, D. M., & Crick, F. H. C. (1959). Acta Cryst., 12, 794–802.
3. Blow, D. M., & Rossmann, M. G. (1961). Acta Cryst., 14, 1195–1202. Correction. Acta Cryst., 15, 1060.
4. Blundell, T.L., & Johnson, L.N. (1976). Protein Crystallography. New York: Academic Press.
5. Bricogne, G. (1984). Acta Cryst., A40, 410–445.