1. Barber, M., B. Patten & J. Finn 1979. Review and evaluation of I-O flow analysis for ecological applications, in: Matis, J., B. Patten & G.White, (Eds)Compartmental Analysis of Ecosystem Models, Vol 10 of Statistical Ecology, Internatl Coop. Publish. House, Bertonsville, Md.
2. Costanza, R. & C. Neill 1981. The energy embodied in the products of the biosphere, pp. 745–755 in: Mitsch, W. J., R. W. Bosserman, and J. M. Klopatek, (Eds) Energy and Ecological Modeling. Elevier, Amsterdam.
3. Costanza, R. & C. Neill 1984. The energy embodied in the products of ecological systems: a linear programming approach. J. Theor. Biol. 106: 41–57
4. Finn, J. 1976. The cycling index. J. Theor. Biol. 56: 363–73
5. Funderlic, R & M. Heath 1971. Linear Compartmental Analysis of Ecosystems. Oak Ridge Natl Lab, ORNL-IBP-71-4.