1. Allen P.M. (1988) Evolution: Why the Whole Is Greater than the Sum of its Parts, in Wolfe M.A. et al. (eds.) Ecodynamics; Contribution to Theoretical Ecology, Springer-Verlag, Berlin.
2. Allen P.M. (1990) Why the Future Is not What it Was, Futures, July/August, 555–570.
3. Allen P.M. (1994) Evolutionary Complex Systems: Models of Technology Change, in Leydesdorff L., Van den Bessalaar P. (eds.) Evolutionary Economics and Chaos Theory, Pinter, London.
4. Allen P.M., Engelen G. (1985) Modelling in Spatial Evolution of Population and Employment - The Case of the USA, in Ebeling W., Peschel M. (eds.) Lotka- Volterra Approach to Cooperation and Competition Modelling in Dynamic System, Mathematical Research, Academie-Verlag, Berlin.
5. Allen P.M., Engelen G. (1987) Computer Handled Energy Efficiency Simulation Exploration (CHEESE) Bureau van Energiebespaaring, North Holland, Amsterdam.