Charland, Katia, Hiroshi Mamiya, and David Buckeridge. “Digital Sources of Food Purchasing Data for the Surveillance of Dietary Patterns”. Online Journal of Public Health Informatics 7, no. 1 (February 26, 2015). Accessed March 28, 2024. https://ojphi.org/ojs/index.php/ojphi/article/view/5676.