Jordan, Lowell S., John R. Abernathy, Samuel R. Aldrich, Charles A. Black, Richard E. Bradley, Harold O. Carter, Robert M. Devlin, et al. «Alternative Agriculture Scientists’ Review». Council for Agricultural Science and Technology (CAST) (julio 10, 1990). Accedido julio 2, 2026. https://publications.cast-science.org/CAST/article/view/237.