PERISTERAS, V. ., S. K. GOUDOS, N. . LOUTAS, and K. . TARABANIS. “AN ONTOLOGICAL REPRESENTATION OF PUBLIC SERVICES: MODELS, TECHNOLOGIES AND USE CASES”. Journal of Web Engineering, vol. 8, no. 3, Nov. 2009, pp. 245-67, https://journals.riverpublishers.com/index.php/JWE/article/view/4053.