@article{MuellerHoehleSchmitzetal.2009,
  author    = {M{\"u}ller, Anja and H{\"o}hle, Barbara and Schmitz, Michaela and Weissenborn, J{\"u}rgen},
  title     = {Information structural constraints on children's early language production : the acquisition of the focus particle "auch" (also) in German learning 12-to 36-month-olds},
  issn      = {0142-7237},
  year      = {2009},
  language  = {en}
}
@article{HoehleBergerMuelleretal.2009,
  author    = {H{\"o}hle, Barbara and Berger, Frauke and M{\"u}ller, Anja and Schmitz, Michaela and Weissenborn, J{\"u}rgen},
  title     = {Focus particles in children's language : production and comprehension of auch "also" in German learners from 1 year to 4 years of age},
  issn      = {1048-9223},
  doi       = {10.1080/10489220802584550},
  year      = {2009},
  language  = {en}
}