Jain, Sheilza, Maneesha Garg, and Akhilesh Swarup. 2013. “Design and Simulation of Robust Controller for Flexure Stage Based Piezo-Actuated Nanopositioning Device ”. International Journal of Control and Automation 6 (2), 17 - 28. http://sersc.org/journals/index.php/IJCA/article/view/146.