@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{BERNHOLDLELLEKKOERSetal.2014,
  author    = {BERNHOLD, T. and LELLEK, V. and KOERS, J. and YOUSSEF, L.},
  title     = {International RESER Conference: Visualization of services - Closing expectations gaps and increasing service quality, XXIV. RESER Conference, 11.-13. September 2014, Helsinki, Finnland},
  pages     = {S. 900 -- 911},
  year      = {2014},
  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}
}
@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{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{KOERSLELLEKBERNHOLDetal.2014,
  author    = {KOERS, J. and LELLEK, V. and BERNHOLD, T. and YOUSSEF, L.},
  title     = {Visualization of services - Closing expectation gaps and increasing service quality; 24th Annual RESER Conference, September 11-13, 2014, Helsinki, Finland.},
  year      = {2014},
  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}
}
@misc{BECKERBERNHOLDBEVERUNGENetal.2012,
  author    = {BECKER, J. and BERNHOLD, T. and BEVERUNGEN, D. and KALING, N. and KNACKSTEDT, R. and LELLEK, V. and RAUER, H.},
  title     = {Softwaregest{\"u}tzte Konstruktion von Produktivit{\"a}tsmodellen im Facility Management, Dienstleistungsmodellierung 2012 (DLM 2012); 3. Workshop im Rahmen der Modellierung 2012, 14.-15. M{\"a}rz 2012, Otto-Friedrich-Universit{\"a}t Bamberg 2012},
  year      = {2012},
  language  = {de}
}
@misc{BERNHOLDSCHLICHTLELLEK2018,
  author    = {BERNHOLD, T. and SCHLICHT, C. and LELLEK, V.},
  title     = {Added Value im CREM/FM - Studienergebnisse - Past - Present - Future, M{\"u}nster, November 2018},
  year      = {2018},
  language  = {de}
}