Rosander, Ulla, Kimmo Rumpunen, Viktoria Olsson, Mikael Åström, Pia Rosander, and Karin Wendin. 2017. “Methodological Considerations in a Pilot Study on the Effects of a Berry Enriched Smoothie on children’s Performance in School”. Food & Nutrition Research 61 (November). https://foodandnutritionresearch.net/index.php/fnr/article/view/1170.