@article {1289,
	title = {Effects of carbon dioxide and nitrogen enrichment on a plantinsect interaction: the quality of Calluna vulgaris as a host  for Operophtera brumata},
	journal = {New Phytologist},
	volume = {140},
	year = {1998},
	pages = {43-53},
	author = {Kerslake, J.E. and Woodin, S.J. and Hartley, S.E.}
}
