1. Allard A.: Variables in Environmental Monitoring Enables a Multitude of Classifications – A Way to Incorporate Inventory Data from National Programs into Harmonization Efforts. Abstract, In Proceedings of Planet Under Pressure 2012, London, England (2012a)
2. Allard, A. (ed.): Instruktion för flygbildsinventeringen vid Nationell Inventering av Landskapet i Sverige, NILS 2007, (in Swedish, an English version of the first year, 2003, is available at: http://www.slu.se/sv/centrumbildningar-och-projekt/nils/publikationer ) (2012b)
3. Allard, A., Glimskär, A., Svensson, J., Christensen, P.: Monitoring landscape and vegetation in the Swedish NILS-program. In: Bryn, A., Dramstad, W. and Fjellstad, W, (red.) Mapping and Monitoring of Nordic Landscapes, Conference Proceedings, Viten fra Skog og landskab, 2010:1: 5–8 (2010)
4. Barr, C.J., Bunce, R.G.H., Clarke, R.T., Firbank, L.G., Gillespie, M.K., Howard, D.C., Petit, S., Smart, S.M., Stuart, R.C., Watkins, J.W.: Methodology of Countryside Survey 2000 Module 1: Survey of Broad Habitats and Landscape Features, Final Report. Centre for Ecology and Hydrology, England (2003)
5. Berglund, H., Sundberg, S., Adler, S.: Art- & naturtypsstatistik – frågeställningar, indikatorer och presentationer för våtmarker. Swedish Species Information Centre, Artdatabanken (2016.) (In Swedish)