Piernas, C., & Popkin, B. M. (2011). Increased portion sizes from energy-dense foods affect total energy intake at eating occasions in US children and adolescents: Patterns and trends by age group and sociodemographic characteristics, 1977–2006(1)(2)(3). American Society for Nutrition.

Piernas, Carmen, and Barry M. Popkin. Increased Portion Sizes From Energy-dense Foods Affect Total Energy Intake At Eating Occasions in US Children and Adolescents: Patterns and Trends By Age Group and Sociodemographic Characteristics, 1977–2006(1)(2)(3). American Society for Nutrition, 2011.

Piernas, Carmen, and Barry M. Popkin. Increased Portion Sizes From Energy-dense Foods Affect Total Energy Intake At Eating Occasions in US Children and Adolescents: Patterns and Trends By Age Group and Sociodemographic Characteristics, 1977–2006(1)(2)(3). American Society for Nutrition, 2011.