Stevens CJ, Dise NB, Gowing DJ, Mountford JO. Loss of forb diversity in relation to nitrogen deposition in the UK: regional trends and potential controls. Global Change Biology. 2006  ;12:1823-1833.

Stevens CJ, Dise NB, Mountford JO, Gowing DJ. Impact of nitrogen deposition on the species richness of grasslands. Science. 2004  ;303(5665):1876-1879.

Walker KJ, Stevens PA, Stevens DA, Mountford JO, Manchester SJ, Pywell RF. The restoration and re-creation of species-rich lowland grassland on land formerly managed for intensive agriculture in the UK. Biological Conservation. 2004  ;119(1):1-18.

Hill MO, Mountford JO, Roy DB, Bunce RGH. Ellenberg's indicator values for British plants: ECOFACT volume 2 technical annex. HMSO; 1999.