@revista_internacional{232,
  keywords = {conceptual schema, hypermedia systems, software evolution},
  author = {Lina García-Cabrera and M.J Rodríguez and J Parets},
  title = {Evolving Hypermedia Systems: A Layered Software Architecture},
  year = {2002},
  journal = {Journal of Software Maintenance and Evolution-Research and Practice},
  volume = {14},
  pages = {389-405},
  publisher = {Wiley},
  url = {http://www3.interscience.wiley.com/cgi-bin/fulltext/99019819/PDFSTART},
}