1. de Bruijn, J., Bussler, C., Domingue, J., Fensel, D., Hepp, M., Keller, U., Kifer, M., König-Ries, B., Kopecky, J., Lara, R., Lausen, H., Oren, E., Polleres, A., Roman, D., Scicluna, J., Stollberg, M.: Web service modeling ontology (WSMO) (W3C Member Submission June 3, 2005)
2. Martin, D., Burstein, M., Hobbs, J., Lassila, O., McDermott, D., McIlraith, S., Narayanan, S., Paolucci, M., Parsia, B., Payne, T., Sirin, E., Srinivasan, N., Sycara, K.: OWL-S: Semantic markup for web services (W3C Member Submission November 22, 2004)
3. Preist, C.: A conceptual architecture for semantic web services (extended version). Technical Report HPL-2004-215 (2004)
4. Lecture Notes in Computer Science;M. Klein,2004
5. Klein, M., König-Ries, B., Müssig, M.: What is needed for semantic service descriptions - a proposal for suitable language constructs. International Journal on Web and Grid Services (IJWGS) 1(3/4) (2005)