@article{KlieglBates2011,
  author    = {Reinhold Kliegl and Douglas Bates},
  title     = {International collaboration in psychology is on the rise},
  doi       = {10.1007/s11192-010-0299-0},
  url       = {http://www.springerlink.com/content/g5987481374222u7/fulltext.pdf},
  year      = {2011},
}