Soil fungi alter interactions between the invader Centaurea maculosa and North American natives

Callaway, R. M., Thelen, G. C., Barth, S., Ramsey, P. W. & Gannon, J. E.  (2004).  Soil fungi alter interactions between the invader Centaurea maculosa and North American natives.  Ecology  85, 1062–1071.