• 2008

    Research article (book contribution)

    Schwingel, S., Vossen, G., & Westerkamp, P. (2008). Securing the Infrastructure for Service-Based E-Learning Environments. In Sugumaran, V., & , (Eds.), Intelligent Information Technologies and Applications (pp. 1–24). Hershey: IGI Global.
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    Vossen, G., & Westerkamp, P. (2008). Secure Identity Management in a Service-Based E-Learning Environment. In Becker, A. S. (Ed.), Electronic Commerce: Concepts, Methodologies, Tools, and Applications (pp. 481–496). New York: Information Science Reference.
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    Westerkamp, P., Dahl, D., & Vossen, G. (2008). Geschäftsmodelle für serviceorientiertes E-Learning. In Grob, H., vom Brocke, J., & Buddendick, C. (Eds.), E-Learning-Management (pp. 85–105). München: Verlag Franz Vahlen.
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    Research article (journal)

    Vossen, G., & Westerkamp, P. (2008). Why Service-Orientation Could Make E-Learning Standards Obsolete. International Journal of Technology Enhanced Learning (IJTEL), 1(1/2), 85–97.
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  • 2007

    Research article (book contribution)

    Vossen, G., & Westerkamp, P. (2007). Service-Oriented Provisioning of Learning Objects. In Koohang, A., & Harman, K. (Eds.), Learning Objects: Applications, Implications, and Future Directions (pp. 287–324). Santa Rosa: Informing Science Press.
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    Research article in proceedings (conference)

    Vossen, G., & Westerkamp, P. (2007). Establishing Business Models for Service-Oriented E-Learning. In Proceedings of the IADIS International Conference e-Learning, Lisbon, Portugal, 35–42.
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  • 2006

    Research article in proceedings (conference)

    Dahl, D., Vossen, G., & Westerkamp, P. (2006). share.loc — A Multi Tiered Interoperable E-Learning Metadata Repository. In Proceedings of the 6th IEEE International Conference on Advanced Learning Technologies (ICALT), Kerkrade, Netherlands, 891–895.
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    Vossen, G., & Westerkamp, P. (2006). Can Service-Orientation Make E-Learning Standards Obsolete?. In Proceedings of the Montreal Conference on eTechnologies (MCeTech), Montreal, Canada, 77–87.
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    Vossen, G., & Westerkamp, P. (2006). Towards the Next Generation of E-Learning Standards: SCORM for Service-Oriented Environments. In Proceedings of the 6th IEEE International Conference on Advanced Learning Technologies (ICALT), Kerkrade, Netherlands, 1031–1035.
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    Research article (journal)

    Schwieren, J., Vossen, G., & Westerkamp, P. (2006). Using Software Testing Techniques for Efficient Handling of Programming Exercises in an E-Learning Platform. Electronic Journal of e-Learning, 4(1), 87–94.
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    Vossen, G., & Westerkamp, P. (2006). Secure Identity Management in a Service-Based E-Learning Environment. International Journal of Intelligent Information Technologies, 2(4), 57–76.
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  • 2005

    Research article in proceedings (conference)

    Hagemann, S., Reimers, S., Vossen, G., & Westerkamp, P. (2005). BOGSY: A Flexible Information System for Botanical Gardens. In Proceedings of the 8th Spring International Conference on Information Systems Implementation and Modelling (ISIM), Hradec nad Moravicí, Czech Republic, 185–192.
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    Schwieren, J., Vossen, G., & Westerkamp, P. (2005). Efficient Handling of Programming Exercises in a Scalable E-Learning Platform. In Proceedings of the 4th European Conference on E-Learning (ECEL), Amsterdam, Netherlands, 389–396.
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    Vossen, G., & Westerkamp, P. (2005). Mediators for Integrating Content into Service-based e-Learning Environments. In Proceedings of the 5th IEEE International Conference on Advanced Learning Technologies (ICALT), Kaohsiung, Taiwan, 580–584.
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    Vossen, G., & Westerkamp, P. (2005). Provisioning in a Service-based E-Learning Platform. In Proceedings of the 2nd International Conference on Innovations in Information Technology (IIT), Dubai, UAE.
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    Westerkamp, P., & Vossen, G. (2005). Building a Service Platform for Electronic Learning. In Proceedings of the 2nd International Conference on Information Technology (ICIT), Amman, Jordan, 151–157.
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    Research article (journal)

    Vossen, G., & Westerkamp, P. (2005). Turning Learning Objects into Web Services. Learning Objects & Learning Designs (The Official Publication of AIS SIG-RLO), 1(1), 16–24.
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  • 2004

    Research article in proceedings (conference)

    Vossen, G., & Westerkamp, P. (2004). Intelligent Content Discovery within E-Learning Web Services. In Proceedings of the 1st International Conference on Knowledge Management (ICKM), Singapore, 365–375.
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    Research article (journal)

    Vossen, G., & Westerkamp, P. (2004). XLX and L2P — Platforms for Blended Learning. EMISA Forum, 2, 18–20.
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    Vossen, G., & Westerkamp, P. (2004). Maintenance and Exchange of Learning Objects in a Web Services Based e-Learning System. Electronic Journal of e-Learning, 2(2), 293–303.
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    Working paper

    Hagemann, S., Rodewald, G., Vossen, G., Westerkamp, P., Albers, F., & Voigt, H. (2004). BoGSy — ein Informationssystem für Botanische Gärten. In Becker, J., Grob, H.-L., Klein, S., Kuchen, H., Müller-Funk, U., & Vossen, G. (Eds.), Arbeitsberichte des Instituts für Wirtschaftsinformatik: Vol. 107. Münster: Institut für Wirtschaftsinformatik, WWU Münster.
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  • 2003

    Research article in proceedings (conference)

    Vossen, G., & Westerkamp, P. (2003). E-Learning as a Web Service (Extended Abstract). In Proceedings of the 7th International Conference on Database Engineering and Applications (IDEAS), Hong Kong, China, 242–249.
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    Vossen, G., & Westerkamp, P. (2003). A Web Services Approach to E-Learning. In Proceedings of the Workshop on E-Learning and Beyond 2003, HTWK Leipzig, 215–228.
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    Vossen, G., & Westerkamp, P. (2003). Distributed Storage and Dynamic Exchange of Learning Objects. In Proceedings of the 2nd European Conference on E-Learning (ECEL), Glasgow, UK, 469–478.
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    Vossen, G., & Westerkamp, P. (2003). Zur Nutzung von Web Services im E-Learning. In Proceedings of the 33. GI-Jahrestagung — Symposium "Entwicklung Web-Service basierter Anwendungen", Frankfurt am Main, 47–58.
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    Vossen, G., & Westerkamp, P. (2003). UDDI for E-Learning: A Repository for Distributed Learning Objects. In Proceedings of the 2nd IASTED International Conference on Information and Knowledge Sharing (IKS), Scottsdale, Arizona, 101–106.
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    Working paper

    Vossen, G., & Westerkamp, P. (2003). E-Learning as a Web Service. In Becker, J., Grob, H.-L., Klein, S., Kuchen, H., Müller-Funk, U., & Vossen, G. (Eds.), Arbeitsberichte des Instituts für Wirtschaftsinformatik: Vol. 92. Münster: Institut für Wirtschaftsinformatik, WWU Münster.
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  • 2002

    Research article in proceedings (conference)

    Hüsemann, B., Lechtenbörger, J., Vossen, G., & Westerkamp, P. (2002). XLX — A Platform for Graduate-Level Exercises. In Proceedings of the International Conference on Computers in Education (ICCE), Auckland, Neuseeland, 1262–1266.
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