Davey, M.P., Bryant, D.N., Cummins, I., Ashenden, T.W., Gates, P. Baxter, R. and Edwards, R. 2004. Effects of elevated CO2 on the vasculature and phenolic secondary metabolism of Plantago maritima. Phytochemistry 65: 2197-2204.

Davey, M.P., Harmens, H., Ashenden, T.W., Edwards, R. and Baxter, R. 2007. Species-specific effects of elevated CO2 on resource allocation in Plantago maritima and Armeria maritima. Biochemical Systematics and Ecology 35: 121-129.