Lamberg-Allardt C., Brustad M., Meyer H. E. and Steingrimsdottir L. (2013) ‚ÄúVitamin D a systematic literature - review for the 5th edition of the Nordic Nutrition Recommendations‚ÄĚ, Food & Nutrition Research, 00. doi: 10.3402/fnr.v57i0.22671.