Dawson, J. O. (2008). "Ecology of Actinorhizal Plants". Nitrogen-fixing Actinorhizal Symbioses. Nitrogen Fixation: Origins, Applications, and Research Progress. Vol. 6. Springer. pp. 199–234. doi:10.1007/978-1-4020-3547-0_8. ISBN978-1-4020-3540-1. S2CID85913801.
Dawson, J. O. (2008). "Ecology of Actinorhizal Plants". Nitrogen-fixing Actinorhizal Symbioses. Nitrogen Fixation: Origins, Applications, and Research Progress. Vol. 6. Springer. pp. 199–234. doi:10.1007/978-1-4020-3547-0_8. ISBN978-1-4020-3540-1. S2CID85913801.