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Tukey, John W. (1954). "Unsolved Problems of Experimental Statistics". Journal of the American Statistical Association. 49 (268): 706–731. doi:10.2307/2281535. JSTOR2281535.
Cox, D. R. (1984). "Present Position and Potential Developments: Some Personal Views: Design of Experiments and Regression". Journal of the Royal Statistical Society. Series A (General). 147 (2): 306–315. doi:10.2307/2981685. JSTOR2981685.