GOH, F. W.; JUNGCK, A. C.; STEVENS, J. R. Pro tip: Screen-based payment methods increase negative feelings in consumers but do not increase tip sizes. European Journal of Behavioral Sciences, [S. l.], v. 4, n. 4, p. 1–21, 2021. DOI: 10.33422/ejbs.v4i4.678. Disponível em: https://www.dpublication.com/journal/EJBS/article/view/678. Acesso em: 8 oct. 2025.