@article {483,
	title = {Estimating the uptake of traffic-derived NO2 from N-15 abundance in Norway spruce needles},
	journal = {Oecologia},
	volume = {118(2)},
	year = {1999},
	pages = {124-131},
	author = {Ammann, M. and Siegwolf, R. and Pichlmayer, F. and Suter, M. and Saure, M. and Brunold, C.}
}
