1. Department of Trade Industry. Short rotation coppice production and the environment. Tech. Status Rep. 014, Renewable Energy Enq. Bureau. Oxfordshire, UK. 1994, p. 6
2. Power Research Institute (EPRI) Workshop, Issues related to the use of genetic engineering for woody energy crops, Palo Alto, CA, 1994
3. O’Leary P. R., Environmental risk assessment of biomass fueled energy production systems. In Energy from Biomass and Wastes, ed. D. L. Klass. Institute of Gas Technology, Chicago, IL, 1989, pp. 531–549
4. Office of Technology Assessment, Potential Environmental Impacts of Bioenergy Crop Production, OTA-BP-E-118. U.S. Govt Printing Office, Washington, D.C., 1993
5. J. Turnbull, Strategies for Achieving a Sustainable, Clean and Cost-effective Biomass resource, Electric Power Research Institute, Palo Alto, CA, 1993