References
- Davies, O. L., Ed. (1957). The Design and Analysis of Industrial Experiments. Hafner Publishing Co., New York, NY, pp. 111–112.
- Shewhart, W. A. (1931). Economic Control of Quality of Manufactured Product. D. Van Nostrand Co., Princeton, NJ. Reprinted by the American Society for Quality Control, Milwaukee, Wisconsin, p. 389.
- Tippett, L. H. C. (1931). The Methods of Statistics. Williams and Norgate, London, England.