@article{MayrSpielerKliegl2001,
  author    = {Mayr, Ulrich and Spieler, D. and Kliegl, Reinhold},
  title     = {Untitled - Introduction},
  year      = {2001},
  language  = {de}
}
@article{OberauerDemmrichMayretal.2001,
  author    = {Oberauer, Klaus and Demmrich, Anke and Mayr, Ulrich and Kliegl, Reinhold},
  title     = {Dissociating retention and access in working memory : an age-comparative study of mental arithmetic},
  year      = {2001},
  language  = {en}
}