REYES-SIMPE, S.; KUBANTSEVA, D. Economics of cold emailing. Journal of business and entrepreneurial studie, [S. l.], v. 9, n. 3, 2025. DOI: 10.37956/jbes.v1i3.398. Disponível em: https://www.journalbusinesses.consultorioampuero.com/index.php/revista/article/view/398. Acesso em: 21 apr. 2026.