@conference {54, title = {Further results on synergistic {L}yapunov functions and hybrid feedback design through backstepping}, booktitle = {Proc. Joint Conference on Decision and Control and European Control Conference}, series = {NULL}, year = {2011}, pages = {7428{\textendash}7433}, keywords = {hybrid systems}, doi = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6161283}, author = {C. G. Mayhew and R. G. Sanfelice and A. R. Teel} }