1. U. an der Heiden. Delays in physiological systems. J. Math. Biol., 8:345–364, 1979.
2. U. an der Heiden and M. C. Mackey. The dynamics of production–destruction: Analytic insight into complex behavior. J. Math. Biol., 16:75–101, 1982.
3. A. P. Arkin and J. Ross. Computational functions in biochemical reaction networks. Biophys. J., 67:560–578, 1994.
4. K. J. Astrom and R. M. Murray. Feedback systems: An introduction for scientists and engineers. Princeton University Press, Princeton, N.J., 2008.
5. J. Bechhoefer. Feedback for physicists: a tutorial essay on control. Rev. Mod. Physics, 77:783–836, 2005.