1. Weininger, D. J. Chem. Inf. Comput. Sci.
1988, 28, 31–36.
2. Greene, J.; Kahn, S.; Savoj, H.; Sprague, P.; Teig, S. J. Chem. Inf. Comput. Sci.
1994, 34, 1297–1308.
3. Boehm, H. J. J. Comput. Aided Mol. Des.
1992, 6, 61–78.
4. Downs, G. M.; Barnard, J. M. J. Inf. Comput. Sci.
1997, 37, 59–61.
5. Daylight Chemical Information Systems Inc.
http://www.Daylight.com
.