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↑ Emilsson, T., Czemiel Berndtsson, J., Mattsson, J-E and Rolf, K., 2007 Effect of using conventional and controlled release fertiliser on nutrient runoff from various vegetated roof systems, Ecological Engineering, Volume 29, Issue 3, Pages 260-271, http://dx.doi.org/10.1016/j.ecoleng.2006.01.001
↑ Czemiel Berndtsson, J., Emilsson, T. and Bengtsson, L., 2006 The influence of extensive vegetated roofs on runoff water quality, Science of The Total Environment, Volume 355, Issues 1-3, Pages 48-63, http://dx.doi.org/10.1016/j.scitotenv.2005.02.035
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