1. Burkert, U. and Allinger, N.L., Molecular Mechanics, American Chemical Society, Washington, DC, 1982, pp. 326.
2. Vinter, J.G., Chem. Br., 21 (1985) 32–38.
3. Hassall, C.H., Chem. Br., 21 (1985) 39–47.
4. Gasteiger, J. and Marsili, M., Tetrahedron, 36 (1980) 3219–3228.
5. Singh, U.C. and Kollman, P.A., J. Comput. Chem., 5 (1984) 129–145.