Stress responses of Calluna vulgaris to reduced and oxidised N applied under 'real world conditions'. Environmental Pollution. 154(3):404-413.. 2008.
Response of phosphomonoesterase activity in the lichen Cladonia portentosa to nitrogen and phosphorus enrichment in a field manipulation experiment. New Phytologist. 186(4):926-933.. 2010.
Direct and indirect effects of ammonia, ammonium and nitrate on phosphatase activity and carbon fluxes from decomposing litter in peatland. Environmental Pollution. 158(10):3157-3163.. 2010.