Exploring the directionality in the relationship between descriptive and injunctive parental and peer norms and snacking behavior in a three-year-cross-lagged study. - Bevelander, K. E.; Burk, W. J.; Smit, C. R.; van Woudenberg, T. J.; Buijs, L.; Buijzen, M. (International Journal of Behavioral Nutrition & Physical Activity, 2020)