4)Godefroid, S. and Koedam, N. (2003): How important are large vs. small forest remnants for the conservation of the woodland flora in an urban context?: Global Ecology & Biogeography 12, 287 - 298.
5)Virolainen, K. M.., Suomi, T., Suhonen, J. and Kuitunen, M. (1998): Conservation of vascular plants in single large and several small mires: species richness, rarity and taxonomic diversity: Journal of Applied Ecology 35, 700 - 707.