JASILIONIENĖ, Regina; TAMOŠIŪNIENĖ, Rima. Investment efficiency evaluation of customer relationship management system: theoretical and practical aspects of return on investment methodology application. Business: Theory and Practice, [S. l.], v. 9, n. 3, p. 221–228, 2008. DOI: 10.3846/1648-0627.2008.9.221-237. Disponível em: https://journals.vilniustech.lt/index.php/BTP/article/view/9137. Acesso em: 10 may. 2025.