References
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- Fleiss J. L. Statistical Methods for Rates and Proportions, Second Ed. John Wiley & Sons, , N.Y. 1981; 33–49
- Selwyn M. R., Gaccionne P. P. (1991) Assessing Normality and Equivariance in Small Multigroup Samples. Proceedings of the Biopharmaceutical Section of the American Statistical Association, Annual Meeting. 1991, 96–101