1. Daniel WW.Biostatistics: a foundation for analysis in the health sciences6th ed. New York, NY: Wiley, 1995; 526.
2. Misuse of statistical methods: critical assessment of articles in BMJ from January to March 1976.
3. Individual Comparisons by Ranking Methods
4. Fisher LD, Belle GV.Biostatistics: a methodology for the health sciencesNew York, NY: Wiley, 1993.
5. Ott RL.An introduction to statistical methods and data analysis4th ed. Belmont, Calif: Wadsworth, 1993.