Chen Y.-C., Huang Y.-C., Lo Y.-T. C., Wu H.-J., Wahlqvist M. L., and Lee M.-S. “Secular Trend towards Ultra-Processed Food Consumption and Expenditure Compromises Dietary Quality Among Taiwanese Adolescents”. Food & Nutrition Research, vol. 62, Sept. 2018, doi:10.29219/fnr.v62.1565.