1. Anon. 1995. Arc/Info 7.1. - Environmental Systems Research Institute.
2. The distribution of plant species in urban vegetation fragments;Bastin,1999
3. Declining plant species richness of grassland ditch banks - problem of colonisation or extinction?;Blomqvist,2003
4. Migration of vascular plants to secondary woodlands in southern Sweden;Brunet,1998
5. The species pool concept applied to forests in a fragmented landscape: dispersal limitation versus habitat limitation;Butaye,2002