Rexer, Marianne, HyeRyeon Lee, Anna Ma, Grace Xiao, and Woojun Lee. 2024. “The Effect of QR Codes on Tipping Behavior and the Link Between QR Codes and Environmental Concern”. Journal of Strategic Innovation and Sustainability 19 (4). https://articlearchives.co/index.php/JSIS/article/view/7220.