1. Duncan, D. B. (1955): Multiple range and multiple F tests, Biometrics, 11, 1-42.
2. Fisher, R. A. (1925): Statistical methods for research workers, 1st ed., Oliver & Boyd.
3. Fisher, R. A. (1935): The design of experiments, 1st ed., Oliver & Boyd.
4. Fisher, R. A. (1956): Statistical methods and scientific inference, 1st ed., Oliver & Boyd.
5. Gower, J. C. (1988): Statistics and agriculture, J. Roy. Statist. Soc. Ser. A, 151, 179-200.