Westphal, CatrinCatrinWestphalSteffan-Dewenter, IngolfIngolfSteffan-DewenterTscharntke, TejaTejaTscharntke2017-09-072017-09-072003https://resolver.sub.uni-goettingen.de/purl?gro-2/6643enMass flowering crops enhance pollinator densities at a landscape scalejournal_article10.1046/j.1461-0248.2003.00523.x3149931