1. 21st Century optical tolerancing: a look at the past and improvements for the future;Youngworth,2006
2. A theoretical and experimental study of lens centering errors and their influence on optical image quality;Hopkins,1966
3. Tolerance Sensitivity and Optimization
4. The inclusion of tolerance sensitivities in the figure of merit for lens optimization;Grey,1978
5. CODE V, “SNS” or “ SAB” functions, Synopsys Inc., Pasadena, California.