Niedzwiedzka, Ewa, and Lidia Wadolowska. “Accuracy Analysis of the Food Intake Variety Questionnaire (FIVeQ). Reproducibility Assessment Among Older People”. Pakistan Journal of Nutrition, vol. 7, no. 3, Apr. 2008, pp. 426–435, https://doi.org/10.3923/pjn.2008.426.435.