@article{HoehleBergerMuelleretal.2009,
  author    = {Barbara H{\"o}hle and Frauke Berger and Anja M{\"u}ller and Michaela Schmitz and J{\"u}rgen Weissenborn},
  title     = {Focus particles in children's language : production and comprehension of auch "also" in German learners from 1 year to 4 years of age},
  doi       = {10.1080/10489220802584550},
  url       = {http://www.informaworld.com/smpp/title~content=t775653668~db=all},
  year      = {2009},
}