ŽVIRBLIS, Algis. The major principles of evaluating total value and competitiveness of services. Business: Theory and Practice, [S. l.], v. 8, n. 2, p. 82–86, 2007. DOI: 10.3846/btp.2007.13. Disponível em: https://journals.vilniustech.lt/index.php/BTP/article/view/11575. Acesso em: 10 may. 2025.