Jacobsen, B. K., and H. Nilsen. “High Education Is Associated With Low Fat and High Fibre, Beta-Carotene and Vitamin C - Computation of Nutrient Intake Based on a Short Food Frequency Questionnaire in 17,265 Men and Women in the Tromsø Study”. Norsk Epidemiologi, vol. 10, no. 1, Nov. 2009, doi:10.5324/nje.v10i1.515.