1. Fuzzy probability and Statistics;Buckley,2006
2. Chan, L. K., Cheng, S. W., & Spiring, F. A. (1990). Alternative variable control chart. Technical report. Canada: University of Manitoba.
3. Semicircle control chart for variables data;Chao;Quality Engineering,1996
4. Max-chart: Combining X-bar and s-chart;Chen;Statistica Sinica,1998
5. An Approximate Approach for Ranking Fuzzy Numbers Based on Left and Right Dominance;Chen;Computers & Mathematics with Applications,2001