Measuring the effects of visual scan codes in advertising - Fortin, David R. and Surovaya, Kate (International Journal of Internet Marketing and Advertising, 2018)
https://katalog.adlr.link/Record/ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTUwNC9pamltYS4yMDE4LjA5NTM3OQ