P. F. Limberger, L. A. Pereira, and T. Pereira, “The impact of customer involvement in airline loyalty programs: a multigroup analysis”, Tour Manage Stud, vol. 17, no. 3, pp. 37–49, Jul. 2021, Accessed: Apr. 29, 2024. [Online]. Available: https://www.tmstudies.net/index.php/ectms/article/view/1375