1. J. Cardoso: E-Tourism: Creating Dynamic Packages using Semantic Web Processes (Proc. W3C Workshop on Frameworks for Semantics in Web Services, Innsbruck, 2005).
2. J. Cardoso: Developing Dynamic Packaging Systems using Semantic Web Technologies. Transactions on Infromation Sceince and Applications, Vol. 3(4) (2006), pp.729-736.
3. K. H. Kim, J. S. Hyun and P. S. Ko: Modeling for Intelligent Tourism E-Marketplace Based on Ontology. Proc. 2007 International Conference on Recreation, Tourism and Hospitality Industry Trends, Taiwan (2007), pp.56-65.
4. X. M. Zhang: A Semantic Grid Oriented to E-Tourism. Proc. The First International Conference on Cloud Computing (CloudCom 2009), LNCS 5931, Beijing (2009), p.485–496.
5. T. Berners-Lee, J. Hendler and O. Lassila: Semantic Web. Scientific American, vol. 284, Issue 5 ( 2001), pp.34-43.