Pitcairn CER, D. F, Leith ID, Sheppard LJ, Tang YS, Sutton MA, D. F. Diagnostic indicators of elevated nitrogen deposition. Environmental Pollution. 2006  ;144.

Leith I, van Dijk N, Pitcairn CER, Wolseley PA, Whitfield CP, Sutton MA. Biomonitoring methods for assessing the impacts of nitrogen pollution: refinement and testing. JNCC; 2005.

Pitcairn CER, Leith ID, N. vanDijk, Sutton MA. Refining and testing the Ellenberg Index  biomonitoring method at the intensive sites. In: Biomonitoring methods for assessing the impacts of nitrogen pollution: refinement and testing. JNCC; 2005. p. 230.

Sutton MA, Pitcairn CER, Leith ID, van Dijk N, Tang YS, Skiba U, Smart S, Mitchell R, Wolseley P, James P, et al. Bioindicator and biomonitoring methods for assessing the effects of atmospheric nitrogen on statutory nature conservation sites. (Sutton MA, Pitcairn CER, Whitfield CP). Peterborough; 2004.

Leith ID, Sheppard LJ, Pitcairn CER, Cape JN, Hill PW, Kennedy VH, Tang YS, Smith RI, D. F. Comparison of the effects of dry deposited N as NH3 with wet deposited N as NH4Cl on acid moorland vegetation. Water Air and Soil Pollution (In press). 2001  .

Fowler D, Dragosits U, Pitcairn CER, Sutton MA, Hall J, Roy DB, Weidemann A. Deposition of acidifying and eutrophying air pollutants in Scotland: Mapping critical loads, critical levels and exceedances. Centre for Ecology and Hydrology; 2001.

Sutton MA, Milford C, Dragosits U, Place CJ, Singles RJ, Smith RI, Pitcairn CER, Fowler D, Hill J, ApSimon HM, et al. Dispersion, deposition and impacts of atmospheric ammonia: quantifying local budgets and spatial variability. Environmental Pollutution (Nitrogen Conference Special Issue). 1998  ;102:349-361.

Fowler D, Sutton MA, Smith RI, Pitcairn CER, Coyle M, l Campbel G, Stedman J. Regional mass budgets of oxidized and reduced nitrogen and their relative contribution to the N inputs of sensitive ecosystems. Environmental Pollutution (Nitrogen Conference Special Issue). 1998  ;102:337-342.

Pitcairn CER, Leith ID, Sheppard LJ, Sutton MA, Fowler D, Munro RC, Tang S, Wilson D. The relationship between nitrogen deposition, species composition and foliar nitrogen concentrations in woodland flora in the vicinity of livestock farms. Environmental Pollution . 1998  ;102:41-48.

Skiba U, Sheppard LJ, Pitcairn CER, Leith ID, Crossley A, van Dijk S, Kennedy VJ, Fowler D. Soil nitrous oxide and nitric oxide emissions as indicators of the exceedance of critical loads of atmospheric nitrogen deposition in semi-natural ecosystems. Environmental Pollution. 1998  ;102(S1):457-461.

Pitcairn CER, Fowler D, Grace J. Deposition of fixed atmospheric nitrogen and foliar nitrogen content of bryophytes and Calluna vulgaris. Environmental Pollution. 1995  ;88:193-205.

Sutton MA, Pitcairn CER, Fowler D. The exchange of ammonia between the atmosphere and plant communities. Advances in Ecological Research. 1993  ;24:301-393.

Pitcairn CER, Fowler D. Changes in species composition of semi-natural vegetation associated with the increase in atmospheric inputs of nitrogen. Bush: Institute of Terrestrial Ecology; 1991.