1. Using nursing activities score to assess nursing workload on a medium care unit;Armstrong;Anesth. Analg.,2015
2. Correspondence among the correlation, RMSE, and Heidke forecast verification measures; refinement of the Heidke score;Barnston;Weather Forecast.,1992
3. A comparison of time-and-motion and self-reporting methods of work measurement;Burke;J. Nurs. Adm.,2000
4. Central Bureau for Statistics (CBS), 18th of May 2017Zorguitgaven in drie benaderingen; aanbieders van zorg. Derived from: https://opendata.cbs.nl/#/CBS/nl/dataset/84054NED/table?ts=1569919225724.
5. R: A Language and Environment for Statistical Computing [Computer Program];Core Team,2015