@article{WyschkonKohnBallaschketal.2009,
  author    = {Anne Wyschkon and Juliane Kohn and Katja Ballaschk and G{\"u}nter Esser},
  title     = {Sind Rechenst{\"o}rungen genau so h{\"a}ufig wie Lese-Rechtschreibst{\"o}rungen?},
  doi       = {10.1024/1422-4917.37.6.499},
  url       = {http://psycontent.metapress.com/content/1422-4917},
  year      = {2009},
}