Berry, J. (1995, 4th Quarter). Obtaining exact significance levels for various nonparametric two-independent-samples problems. Observations: The Technical Journal For SAS Software Users, 40-52.
2.
Efron, B. , & Tibshirani, R. J. (1993). An introduction to the bootstrap. New York: Chapman & Hall.
3.
Foster, G. (1995, 2nd Quarter). The randomization test applied to the means of two independent samples. Observations: The Technical Journal For SAS Software Users, 51-62.
4.
Good, P. (1994). Permutation tests. New York: Springer-Verlag.
5.
Lehmann, E. I. (1975). Nonparametrics: Statistical methods based on ranks. San Francisco: Holden-Day.
6.
Randles, R. H. , & Wolfe, D. A. (1979). Introduction to the theory of nonparametric statistics. New York: Wiley.
