1. P.O.S.T., Arctic Changes, Parliamentary Office for Science and Technology, London, Postnote 334, 2009.
2. MACIS Project, Minimisation of and Adaptation to Climate change impacts on Biodiversity, Framework Programme 6 project, publications webpage at: www.macis-project.net/pub.html.
3. Positive and negative plant–plant interactions in two contrasting arctic-alpine plant communities;Olofsson;Arctic, Antarctic, and Alpine Research,2004
4. The Biology of Mutualism,1985
5. Community Ecology;Morin,1990