%0 Journal Article %J Ecology %D 2001 %T Landscape connectivity: a graph-theoretic perspective %A Urban, D %A Keitt, T %B Ecology %V 82 %P 1205–1218 %G eng %U http://www.esajournals.org/doi/abs/10.1890/0012-9658(2001)082[1205:LCAGTP]2.0.CO;2