Mills G, Wagg S, Harmens H. Ozone pollution: Impacts on ecosystem services and biodiversity. Bangor, UK.: Centre for Ecology and Hydrology; 2013. Available from: http://icpvegetation.ceh.ac.uk/publications/thematic.html.

Harmens H, Foan L, Simon V, Mills G. Terrestrial mosses as biomonitors of atmospheric POPs pollution: A review. Environmental Pollution. 2013  ;173:245-254.

Harmens H, Mills G. Ozone pollution: Impacts on carbon sequestration in Europe. Bangor, UK.: Centre for Ecology and Hydrology; 2012.

Mills G, Hayes F, Simpson D, Emberson L, Norris D, Harmens H, Buker P. Evidence of widespread effects of ozone on crops and (semi-)natural vegetation in Europe (1990?2006) in relation to AOT40- and flux-based risk maps. Global Change Biology. 2011  ;17:592-613.

Mills G, Pleijel H, Braun S, Buker P, Bermejo V, Calvo E, Danielsson H, Emberson L, I. Fernandez G, Grunhage L, et al. New stomatal flux-based critical levels for ozone effects on vegetation. Atmospheric Environment. 2011  ;45:5064-5068.

Harmens H, Norris DA, Cooper DM, Mills G, Steinnes E, Kubin E, Thoni L, Aboal JR, Alber R, Carballeira A, et al. Nitrogen concentrations in mosses indicate the spatial distribution of atmospheric nitrogen deposition in Europe. Environmental Pollution. 2011  ;159:2852-2860.

Mills G, Harmens H. Ozone pollution: a hidden threat to food security. ICP Vegetation Coordination Centre; 2011.

Schroder W, Holy M, Pesch R, Harmens H, Fagerli H, Alber R, Coskun M, De Temmerman L, Frolova M, Gonzalez-Miqueo L, et al. First Europe-wide correlation analysis identifying factors best explaining the total nitrogen concentration in mosses. Atmospheric Environment. 2010  ;44(29):3485-3491.

Hayes F, Mills G, Harmens H, Norris D. Evidence of widespread ozone damage to vegetation in Europe (1990-2006). Bangor, UK.: Centre for Ecology and Hydrology; 2007.

Hayes F, Mills G, Williams P, Harmens H, Buker P. Impacts of summer ozone exposure on the growth and overwintering of UK upland vegetation. Atmospheric Environment. 2006  ;40:4088-4097.