@inproceedings{BernholdSchlichtLellek2019,
  author    = {Bernhold, Torben and Schlicht, Christian and Lellek, Vanessa},
  title     = {Become an Outperformer! - Measurement of added value},
  series = {Research Paper for the 18th EuroFM Research Symposium},
  booktitle = {Research Paper for the 18th EuroFM Research Symposium},
  editor    = {Tucker, Matthew},
  publisher = {EuroFM},
  address   = {Schiphol-Rijk},
  isbn      = {978-94-90694-10-4},
  pages     = {44 -- 56},
  year      = {2019},
  language  = {en}
}
@article{BECKERBERNHOLDBEVERUNGENetal.2012,
  author    = {BECKER, J. and BERNHOLD, T. and BEVERUNGEN, D. and KALING, N. and KNACKSTEDT, R. and LELLEK, V. and RAUER, H. P.},
  title     = {Construction of Productivity Models: A Tool Supported Approach in the Area of Facility Management},
  series = {Enterprise Modelling and Information Systems Architectures},
  volume    = {7},
  journal   = {Enterprise Modelling and Information Systems Architectures},
  number    = {1},
  doi       = {10.18417/emisa.7.1.2},
  pages     = {26 -- 40},
  year      = {2012},
  language  = {en}
}
@misc{LELLEKAVERBECK2013,
  author    = {LELLEK, V. and AVERBECK, A.},
  title     = {Creation of value for guest - measuringof Facility Services in hotels including the customer value. In: Proceedings of the 15th Facility \& Real Estate Management Congress, 6. - 8. February 2013, Hotel and leisure facilities, Kufstein.},
  year      = {2013},
  language  = {en}
}
@misc{BERNHOLDKALINGLELLEK2011,
  author    = {BERNHOLD, T. and KALING, N. and LELLEK, V.},
  title     = {Measurement of productivity of property services: an empiric analysis of the status quo, XXI. International RESER Conference, Hamburg, 07.09.-10.09.2011 2011},
  year      = {2011},
  language  = {en}
}
@incollection{BERNHOLDKALINGLELLEK2012,
  author    = {BERNHOLD, T. and KALING, N. and LELLEK, V.},
  title     = {Productivity Measurement Model - A Holistic Approach For Services},
  series = {JUNGHANS, A.; JENSEN, P. A (Editors) Proceedings of the 11th EuroFM Research Symposium, 24.-25. May 2012 in Copenhagen, Denmark},
  booktitle = {JUNGHANS, A.; JENSEN, P. A (Editors) Proceedings of the 11th EuroFM Research Symposium, 24.-25. May 2012 in Copenhagen, Denmark},
  publisher = {Polyeknisk Forlag 2012},
  address   = {Lyngby :},
  pages     = {20 -- 30},
  year      = {2012},
  language  = {en}
}
@incollection{BERNHOLDKALINGLELLEK2012,
  author    = {BERNHOLD, T. and KALING, N. and LELLEK, V.},
  title     = {Productivity Measurement Model - A Holistic Approach For Services},
  series = {JUNGHANS, A.; JENSEN, P. A (Editors) Proceedings of the 11th EuroFM Research Symposium, 24.-25. May 2012 in Copenhagen, Denmark},
  booktitle = {JUNGHANS, A.; JENSEN, P. A (Editors) Proceedings of the 11th EuroFM Research Symposium, 24.-25. May 2012 in Copenhagen, Denmark},
  publisher = {Polyeknisk Forlag 2012},
  address   = {Lyngby :},
  pages     = {20 -- 30},
  year      = {2012},
  language  = {en}
}
@misc{BERNHOLDLELLEKKUeRSCHNERetal.2013,
  author    = {BERNHOLD, T. and LELLEK, V. and K{\"U}RSCHNER, M. and AVERBECK, A.-K.},
  title     = {Productivity Measurement of Facility Services - A web-based CAFM Application; XXIII International RESER Conference; September 19th-21st 2013, Aix en Provence},
  year      = {2013},
  language  = {en}
}
@misc{LELLEKBERNHOLD2015,
  author    = {LELLEK, V. and BERNHOLD, T.},
  title     = {Productivity Measurement of Service - Models and Web-based Computer Applications; 3rd International Conference on Management, Leadership and Governance - ICMLG 2015, 12-13 February 2015, Auckland, New Zealand.},
  year      = {2015},
  language  = {en}
}
@incollection{BERNHOLDKALINGLELLEK2011,
  author    = {BERNHOLD, T. and KALING, N. and LELLEK, V.},
  title     = {Produktivit{\"a}tsmessung von Dienstleistungen},
  series = {BERNHOLD, T.; GELLENBECK, K.; RIEMENSCHNEIDER, F., M{\"u}nsteraner Schriften zum Facility Management},
  booktitle = {BERNHOLD, T.; GELLENBECK, K.; RIEMENSCHNEIDER, F., M{\"u}nsteraner Schriften zum Facility Management},
  publisher = {INFA-ISFM e.V.},
  address   = {M{\"u}nster, Ahlen},
  pages     = {108 -- 122},
  year      = {2011},
  language  = {de}
}
@incollection{BERNHOLDKALINGLELLEK2012,
  author    = {BERNHOLD, T. and KALING, N. and LELLEK, V.},
  title     = {Produktivit{\"a}tsmessung von Immobilien-Services - empirische Analyse und Status Quo},
  series = {Facility Management Messe 2012 Tagungsband},
  booktitle = {Facility Management Messe 2012 Tagungsband},
  publisher = {VDE Verlag 2012},
  address   = {Berlin, Offenbach},
  pages     = {157 -- 170},
  year      = {2012},
  language  = {de}
}