@incollection{BERNHOLDKALINGLELLEK2011,
  author    = {T. BERNHOLD and N. KALING and M. LELLEK},
  title     = {Measurement of productivity of property services - an empiric analysis of the status quo},
  booktitle = {GANZ, W.; KIRCHERER, F.; SCHLETZ, A. (Hrsg.); Productivity of Services NextGen - Beyond Output/Input},
  edition   = {1. Aufl.},
  isbn      = {978-3-8396-0297-3},
  year      = {2011},
}