1. Bradley, R.A.: Science, statistics and paired comparisons. Biometrics 32, 213–232 (1976)
2. David, H.A.: The Method of Paired Comparisons, 2nd edn. Ch. Griffin, London (1988)
3. Domański, C.: Statistical Tests (in Polish). PWE, Warsaw (1990)
4. Gordon, A.D.: Classification, 2nd edn. Chapman & Hall/CRC (1999)
5. Garfinkel, R.S., Nemhauser, G.L.: Integer Programming. Wiley, New York (1972)