- Economics and the environmentAllen V. Kneese, Robert U. Ayres et al.
- Encyclopedia of energyCutler J. Cleveland, Robert U. Ayres
- Crossing the energy divideRobert U. Ayres
- Resources, environment, and economicsRobert U. Ayres
- Information entropy and progressRobert U. Ayres
- Scarcity and growth revisitedRobert U. Ayres