KADERJÁK, Gyula. Customer Relationship Systems and Business Models. Acta Agraria Debreceniensis, [S. l.], n. 34, p. 99–106, 2009. DOI: 10.34101/actaagrar/34/2826. Disponível em: https://ojs.lib.unideb.hu/actaagrar/article/view/2826.. Acesso em: 19 may. 2024.