1. Larson, D. W. & Kelly, P. E. Can. J. Bot. 69, 1628–1636 (1991).
2. Kelly, P. E. & Larson, D. W. J. Ecol. 85, 467–478 (1997).
3. Kelly, P. E., Cook, E. R. & Larson, D. W. Can. J. Forest. Res. 24, 1049–1057 (1994).
4. Zar, J. H. Biostatistical Analysis (Prentice-Hall, Englewood Cliffs, NJ, 1974).
5. Conover, W. J. Practical Non-parametric Statistics 2nd edn (Wiley, New York, 1971).