Eurostat. 2015. Notice of Intention of the Business Statistics Directors Groups (BSDG) and the Directors of Macroeconomic Statistics (DMES) on the Consistent Implementation of Council Regulation (EC) No. 696/93 on statistical units, June 2015. Available at: https://circabc.europa.eu/w/browse/77baec33-ccf3-409c-a552-9253bd6a9806 (accessed February 2018).
Groves, R.M., F.J. Fowler jr., M.P. Couper, J.M. Lepkowski, E. Singer, and R. Tourangeau. 2004. Survey Methodology. New York: Wiley Interscience.
Haag, O. 2018. “How to Improve the Quality of the Statistics by Combining Different Statistical Units?” In The Unit Problem and Other Topics in Business Survey Methodology, edited by B. Lorenc, M. Bavdaz, G. Haraldsen, D. Nedyalkova, P.A. Smith, L-C. Zhang, and T. Zimmermann. Proceedings of the European Establishment Statistics Workshop 2017. Newcastle, UK: Cambridge Scholars Publishing (forthcoming).
Sturm, R. 2015. “Revised Definitions for Statistical Units – Methodology, Application and User Needs, the Main Conceptual Issues of the “Units Discussion” of the Years 2009–2014.” Statistika 95(3): 55–63.