Conway, Roger K., Don Erbach, Marvin Duncan, Paul Gallagher, Philip L. Shane, Peter F. Smith, y M. E. Tumbleson. «Bioenergy: Pointing To The Future». Council for Agricultural Science and Technology (CAST) (noviembre 6, 2004). Accedido julio 1, 2026. https://publications.cast-science.org/CAST/article/view/169.