MEHROTRA, Dr. Tushar. Challenges in Measuring ROI of Cross-Device Advertising Campaigns. Journal of Quantum Science and Technology, [S. l.], v. 2, n. 3, p. Aug(67–80), 2025. DOI: 10.63345/jqst.v2i3.339. Disponível em: https://jqst.org/index.php/j/article/view/339. Acesso em: 21 oct. 2025.