Previous Article Next Article Table of Contents IEEE Transactions on Automatic Control, Vol.61, No.9, 2386-2401, 2016 DOI10.1109/TAC.2015.2492098 Export Citation Observer Design for Unilaterally Constrained Lagrangian Systems: A Passivity-Based Approach Tanwani Aneel, Brogliato Bernard, Prieur Christophe Please enable JavaScript to view the comments powered by Disqus.