Charles B. Davey Miller, J. E., Shafer, SR, Schoeneberger, M. M., Pursley, W. A., Horton, S. J., & Davey, C. B. (1997). Influence of a mycorrhizal fungus and/or rhizobium on growth and biomass partitioning of subterranean clover exposed to ozone. WATER AIR AND SOIL POLLUTION, 96(1-4), 233–248. https://doi.org/10.1023/A:1026496420809 Davey, C. B., & Wollum, A. G., II. (1984). Nitrogen fixation systems in forest plantations. In Nutrition of plantation forests (p. 361). London: Academic Press.