@conference {49, title = {Synergistic {L}yapunov functions and backstepping hybrid feedbacks}, booktitle = {Proc. 30th American Control Conference}, series = {NULL}, year = {2011}, pages = {3203{\textendash}3208}, keywords = {hybrid systems}, doi = {http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5991021}, author = {C. G. Mayhew and R. G. Sanfelice and A. R. Teel} }