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\bibitem{santi03}
E.~Santi, A.~Monti, D.~Li, K.~Proddutur, and R.~Dougal, ``Synergetic control
  for {DC-DC} boost converter: {I}mplementation options,'' \emph{IEEE
  Transactions on Industry Applications}, vol.~39, no.~6, pp. 1803--1813,
  November/December 2003.

\bibitem{santi04}
------, ``{Synergetic Control for Power Electronics Applications: {A}
  Comparison with the Sliding Mode Approach},'' \emph{Journal of Circuits,
  Systems, and Computers}, vol.~13, no.~4, pp. 737--760, 2004.

\bibitem{nwzakasme06}
Nusawardhana and S.~H. \.{Z}ak, ``Optimality of synergetic controllers,'' in
  \emph{Proceedings of 2006 ASME International Mechanical Engineering Congress
  and Exposition}, American Society of Mechanical Engineers.\hskip 1em plus
  0.5em minus 0.4em\relax Chicago, IL: ASME, November 5--10 2006.

\bibitem{nwzakcrossleygnc07}
Nusawardhana, S.~H. \.{Z}ak, and W.~A. Crossley, ``Nonlinear synergetic optimal
  control,'' \emph{AIAA Journal of Guidance, Control, and Dynamics}, vol. Vol.
  30, no. No. 4, pp. 1134--1147, July–August 2007.

\bibitem{behcetcorless02}
A.~B. A\c{c}ikme\c{s}e and M.~Corless, ``{Robust Output Tracking for
  Uncertain/Nonlinear Systems Subject to Almost Constant Disturbances},''
  \emph{Automatica}, vol.~38, pp. 1919--1926, 2002.

\bibitem{Zak03}
S.~H. \.{Z}ak, \emph{Systems and Control}.\hskip 1em plus 0.5em minus
  0.4em\relax New York: Oxford University Press, 2003.

\bibitem{edwardsspurgeon98}
C.~Edwards and S.~Spurgeon, \emph{Sliding Mode Control: Theory and
  Applications}.\hskip 1em plus 0.5em minus 0.4em\relax Taylor \& Francis,
  1998.

\bibitem{utkin92}
V.~Utkin, \emph{Sliding Modes in Control and Optimization}.\hskip 1em plus
  0.5em minus 0.4em\relax Heidelberg: Springer-Verlag Berlin, 1992.

\bibitem{slotineli91}
J.~Slotine and W.~Li, \emph{Applied Nonlinear Control}.\hskip 1em plus 0.5em
  minus 0.4em\relax Englewood Cliffs, NJ: Prentice Hall, Inc., 1991.

\bibitem{zakhui93a}
S.~H. \.{Z}ak and S.~Hui, ``On variable structure output feedback controllers
  of uncertan dynamic systems,'' \emph{IEEE Transactions on Automatic Control},
  vol.~38, no.~10, pp. 1509--1512, October 1993.

\bibitem{passino05}
K.~Passino, \emph{Biomimicry for Optimization, Control, and Automation}.\hskip
  1em plus 0.5em minus 0.4em\relax London, UK: Springer-Verlag, 2005.

\end{thebibliography}
