* Karnopp, Dean C., Margolis, Donald L., Rosenberg, Ronald C., 1990: "System dynamics: a unified approach", Wiley, ISBN 0-471-62171-4.
* Karnopp, Dean C., Margolis, Donald L., Rosenberg, Ronald C., 1990: "System dynamics: a unified approach", Wiley, ISBN 0-471-62171-4.