@article{486,
  author       = {Tietze, Anna L. and Zernikow, Boris and Otto, Michael and Hirschfeld, Gerrit and Michel, Erik and Koh, Michelle and Blankenburg, Markus},
  issn         = {1878-5506},
  journal      = {Sleep Medicine},
  pages        = {219--227},
  title        = {{The development and psychometric assessment of a questionnaire to assess sleep and daily troubles in parents of children and young adults with severe psychomotor impairment.}},
  doi          = {10.1016/j.sleep.2013.09.019},
  volume       = {15},
  year         = {2014},
}

@article{473,
  author       = {Blankenburg, Markus and Tietze, Anna-Lena and Hechler, Tanja and Hirschfeld, Gerrit and Michel, Erik  and Koh, Michelle and Zernikow, Boris},
  issn         = {1878-5506},
  journal      = {Sleep Medicine},
  number       = {4},
  pages        = {339--351},
  publisher    = {Elsevier},
  title        = {{Snake: the development and validation of a questionnaire on sleep disturbances in children with severe psychomotor impairment}},
  doi          = {10.1016/j.sleep.2012.12.008},
  volume       = {14},
  year         = {2013},
}