1. P. Mateti and N. Deo,SIAM J. Comput., 1976,5, 90.
2. R. G. Freeland, S. A. Funk, L. J. O'Korn, and G. A. Wilson,J. Chem. Inf. Comput. Sci., 1979,19, 94.
3. J. D. Roberts and M. C. Caserio,Basic Principles of Organic Chemistry. Supplement for Basic Principles of Organic Chemistry, California Institute Technology, W. A. Benjamin, Inc., New York-Amsterdam, 1964;A Guide to IUPAC Nomeclature of Organic Compounds, Blackwell, Oxford, 1993, 182 pp.
4. W. Lipski,Kombinatoryka dla Programistow [Combinatorial Analysis for Programmers], Wydawnictwa, Naukowo-Techniczne, Warszawa, 1982 (in Polish).
5. R. Fugman, U. Dolling, and H. Nickelsen,Angew. Chem. Int. Ed. Engl., 1967,6, 723.