%0 Journal Article %T Quantifying the erosion of natural darkness in the global protected area system %A Gaston, Kevin J. %A Duffy, James P. %A Bennie, Jonathan %J Conservation Biology %V 29 %N 4 %P 1132-1141 %@ 0888-8892 %D 2015-08-01 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve