CHRISTOFFEL, M. ., G. . WOJKE, S. . WERNER, R. . REZEK, and S. . XU. “AN AGENT-ORIENTED APPROACH TO THE INTEGRATION OF INFORMATION SOURCES”. Journal of Web Engineering, vol. 4, no. 3, Mar. 2005, pp. 224-43, https://journals.riverpublishers.com/index.php/JWE/article/view/4279.