Wang, L. K., J.-Y. Shieh, and K. Huang. “A Two-Stage Taguchi Design Example-Image Quality Promotioin Miniature Camera/Cell-Phone Lens”. International Journal of Engineering and Technology Innovation, vol. 2, no. 3, July 2012, pp. 163-71, https://ojs.imeti.org/index.php/IJETI/article/view/75.