Repeated, high-severity wildfire catalyzes invasion of non-native plant species in forests of the Klamath Mountains, northern California, USA.

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Tansy ragwort, Senecio jacobaea L.

Burrill, L. C., Callihan, R. H., Parker, R., Coombs, E., Radtke, H., (1994). Pacific Northwest Cooperative Extension Publication(No. pnw175), 8 pp. Washington State University Cooperative Extension, Pullman, Washington, USA. English language

Weed ecology of agricultural peatland.

MacNaeidhe, F. S., Curran, P. L., Research Report, Faculty of General Agriculture, University College Dublin, 1978-1979., 185 pp. English language