Bjørnarå, H. B., E. R. Hillesund, M. K. Torstveit, T. H. Stea, N. C. Øverby, and E. Bere. “An Assessment of the Test-Retest Reliability of the New Nordic Diet Score”. Food & Nutrition Research, vol. 59, Aug. 2015, doi:10.3402/fnr.v59.28397.