@Inproceedings{bolles2008streaming,
  author = {Bolles, Andre and Grawunder, Marco and Jacobi, Jonas},
  title  = {Streaming SPARQL - Extending SPARQL to process data streams},

  year   = {2008},
  number = {},
  url    = {http://data.semanticweb.org/conference/eswc/2008/papers/3},

  const  = {\ text}
}
@Inproceedings{langegger2008semantic,
  author = {Langegger, Andreas and Wöß, Wolfram and Blöchl, Martin},
  title  = {A Semantic Web Middleware for Virtual Data Integration on the Web},

  year   = {2008},
  number = {},
  url    = {http://data.semanticweb.org/conference/eswc/2008/papers/244},

  const  = {\ text}
}
@Inproceedings{quilitz2008querying,
  author = {Quilitz, Bastian and Leser, Ulf},
  title  = {Querying Distributed RDF Data Sources with SPARQL},

  year   = {2008},
  number = {},
  url    = {http://data.semanticweb.org/conference/eswc/2008/papers/168},

  const  = {\ text}
}