@article{koutsomitropoulos_solomou_alexopoulos_papatheodorou_2009, 
  title={Semantic Metadata Interoperability and Inference-Based Querying in Digital Repositories}, 
  DOI={10.4018/jitr.2009062903}, 
  publisher={IGI Global}, 
  author={Koutsomitropoulos and Solomou and Alexopoulos and Papatheodorou}, 
  year={2009}
  }