@article{MeckelmannDannenhauer2014,
  author    = {Meckelmann, Viola and Dannenhauer, Nina Alice},
  title     = {Developmental Tasks for Contemporary Adolescents Significance and Coping},
  series = {Zeitschrift f{\"u}r Soziologie der Erziehung und Sozialisation},
  volume    = {34},
  journal   = {Zeitschrift f{\"u}r Soziologie der Erziehung und Sozialisation},
  number    = {2},
  publisher = {Juventa-Verl.},
  address   = {Weinheim},
  issn      = {1436-1957},
  pages     = {182 -- 197},
  year      = {2014},
  language  = {de}
}
@article{WarschburgerHaenigFriedtetal.2014,
  author    = {Warschburger, Petra and Haenig, Johanna and Friedt, Michael and Posovszky, Carsten and Schier, Maike and Calvano, Claudia},
  title     = {Health-Related quality of life in children with abdominal pain due to functional or organic gastrointestinal disorders},
  series = {Journal of pediatric psychology},
  volume    = {39},
  journal   = {Journal of pediatric psychology},
  number    = {1},
  publisher = {Oxford Univ. Press},
  address   = {Cary},
  issn      = {0146-8693},
  doi       = {10.1093/jpepsy/jst070},
  pages     = {45 -- 54},
  year      = {2014},
  language  = {en}
}