1. Duncan, A. J. (1965). Quality control and industrial statistics (3rd ed.). Richard D. Irwin, Inc.
2. Kang, C. W., Lee, M. S., Seong, Y. J., & Hawkins, D. M. (2007). A control chart for the coefficient of variation. Journal of Quality Technology, 39(2), 151–158.
3. Kushler, R. H., & Hurley, P. (1992). Confidence bounds for capability indices. Journal of Quality Technology, 24(4), 188–195.
4. Pardo, S. A. (2014). Equivalence and noninferiority tests for quality, manufacturing, and test engineers. Chapman & Hall/CRC.
5. Schilling, E. G. (1982). Acceptance sampling in quality control. Marcel Dekker, Inc., ASQC Press.