@article{SchroderGemballaRuppinetal.2012,
  author    = {Astrid Schroder and Teresa Gemballa and Steffie Ruppin and Isabell Wartenburger},
  title     = {German norms for semantic typicality, age of acquisition, and concept familiarity},
  journal   = {Behavior research methods : a journal of the Psychonomic Society},
  volume    = {44},
  number    = {2},
  pages     = {380 -- 394},
  doi       = {10.3758/s13428-011-0164-y},
  year      = {2012},
}