Manninen S, Woods C, Leith ID, Sheppard LJ. Physiological and morphological effects of long-term ammonium or nitrate deposition on green and red (shade and open grown) Sphagnum capillifolium. Environmental and Experimental Botany. 2011  ;72:140-148.

Sheppard LJ, Leith ID, Crossley A, van Dijk N, Fowler D, Sutton MA, Woods C. Stress responses of Calluna vulgaris to reduced and oxidised N applied under 'real world conditions'. Environmental Pollution. 2008  ;154:404-413.

Sheppard LJ, Leith ID, Crossley A, van Dijk N, Fowler D, Sutton MA, Woods C. Stress responses of Calluna vulgaris to reduced and oxidised N applied under real world conditions. Environmental Pollution. 2008  ;154 (3):404-413.

Carreira JA, Harrison AF, Sheppard LJ, Woods C. Reduced soil P availability in a Sitka spruce (Picea sitchensis (Bong) Carr) plantation induced by applied acid-mist: Significance in forest decline. Forest Ecology and Management . 1997  ;92:53-166.