References
- Boyd, D. F. (1950). “Applying the Group Chart for X̄ and R.” Industrial Quality Control 7, pp. 22–25.
- Burr, I. W. (1976). Statistical Quality Control Methods. Marcel Dekker, New York, NY, Sec. 7.5.3.
- Clifford, P. C. (1985). Personal correspondence.
- Nelson, L. S. (1982). “Control Chart for Medians.” Journal of Quality Technology 14, pp. 226–227.
- Nelson, L. S. (1984). “The Shewhart Control Chart—Tests for Special Causes.” Journal of Quality Technology 16, pp. 237–239.
- Nelson, P. R. (1986). Personal communication giving the result of a derivation of the ARL.