1. Estimating the uptake of traffic-derived NO2 from 15N abundance in Norway spruce needles;Ammann;Oecologia,1999
2. AQEG, 2004. Nitrogen Dioxide in the United Kingdom. Air Quality Expert Group. Department for Environment, Food and Rural Affairs. (http://www.defra.gov.uk/environment/airquality/aqeg)
3. Ashenden, T.W., Ashmore, M., Bell, J.N.B., Bignal, K., Binnie, J., Cape, J.N., Caporn, S.J.M., Carroll, J., Davison, A., Hadfield, P., Honour, S., Lawton, K., Moore, S., Power, S., Shields, C., 2003. Impacts of vehicle emissions on vegetation. Urban Transport IX: Urban Transport and the Environment in the 21st Century. Advances in Transport, pp. 313–322.
4. Spatial and temporal variation in nitrogen dioxide pollution adjacent to rural roads;Bell;Water, Air and Soil Pollution,1997
5. Road verges as habitat for small mammals in Britain;Bellamy;Mammal Review,2000