1. Emergy Evaluation of the Biosphere and Natural Capital, 1999.
2. Emergy Measures of Carrying Capacity to Evaluate Economic Investments, 2001.
3. Emergy-based indices and ratios to evaluate sustainability: monitoring economies and technology toward environmentally sound innovation, 1997.
4. Emergy indices and ratios for sustainable material cycles and recycle options, 2003.
5. Spatial modeling of empower and environmental loading.
