@article{HolzschuhDormannTscharntkeetal.2013,
  author    = {Andrea Holzschuh and Carsten F. Dormann and Teja Tscharntke and Ingolf Steffan-Dewenter},
  title     = {Mass-flowering crops enhance wild bee abundance},
  journal   = {Oecologia},
  volume    = {172},
  number    = {2},
  doi       = {dx.doi.org/10.1007/s00442-012-2515-5},
  year      = {2013},
}