R. Yoshida, M. Tanaka, S. Onodera, T. Yamaguchi and E. Kokufuta, “In-Phase Synchronization of Chemical and Mechanical Oscillations in Self-Oscillating Gels,” The Journal of Physical Chemistry A, Vol. 104, No. 32, 2000, pp. 7549-7555. http://dx.doi.org/10.1021/jp0011600