Smith EP, Witherspoon DP, Bhargava S, Bermudez JM. Cultural values and behavior among African American and European American children. J Child Fam Stud. 2019 May 1;28:1236-49.
Christensen T, Riis AH, Hatch EE, Wise LA, Nielsen MG, Rothman KJ, Toft Sorensen H, Mikkelsen EM. Costs and efficiency of online and offline recruitment methods: a web-based cohort study. J Med Internet Res. 2017 Mar 1;19(3):e58. doi: 10.2196/jmir.6716