@article {618,
	title = {Effects of gaseous air pollutants on aphid performance on Scots pine and Norway spruce seedlings. },
	journal = {Water, Air and Soil Pollution},
	volume = {85},
	year = {1995},
	pages = {1431-1436},
	author = {Holopainen, J. K. and Kainulainen, P. and Oksanen, J.}
}
