@book{UBHD-66965025,
  author={Franke, Bernhard},
  title={Fehlende Angaben in Frageb{\"o}gen zur Beurteilung der subjektiven Lebensqualit{\"a}t},
  subtitle={Interventionsstudie zur Verringerung von "missing item values"},
  year={2010},
  pages={96 Bl.},
  language={ger},
  school={Heidelberg, Univ., Diss., 2010},
  library={UB [Signatur: 2010 U 1022]},
}
@article{UBHD-67558127,
  author={M{\"u}ller-B{\"u}hl, Uwe and Franke, Bernhard and Krug, Katja and Engeser, Peter},
  title={Lowering missing item values in quality-of-life questionnaires},
  subtitle={an interventional study},
  year={2011},
  pages={63-69},
  language={eng},
  issn={1661-8556},
  volume={56},
  journal={International journal of public health},
}
@article{UBHD-68964347,
  author={M{\"u}ller-B{\"u}hl, Uwe and Franke, Bernhard and Krug, Katja and Engeser, Peter},
  title={Lowering missing item values in quality-of-life questionnaires},
  subtitle={an interventional study},
  year={2011},
  pages={63-69},
  language={eng},
  issn={1661-8564},
  volume={56},
  note={First published online: 22 December 2009 ; Gesehen am 14.09.2022},
  journal={International journal of public health},
  doi={10.1007/s00038-009-0113-z},
}