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.

Jones MLM, Reynolds B, Stevens PA, Norris DA. Changing nutrient budget of sand dunes: consequences for the nature conservation interest and dune management. 1 .; 2002.

Stevens PA, Williams TG, Norris DA, Rowland AP. Dissolved inorganic nitrogen budget for a forested catchment at Beddgelert, North Wales. Environmental Pollution. 1993  ;80:1-8.