Maristella Agosti José Luis Borbinha Sarantos Kapidakis Christos Papatheodorou Giannis Tsakonas Research and Advanced Technology for Digital Libraries, 13th European Conference, ECDL 2009, Corfu, Greece, September 27 - October 2, 2009. Proceedings 5714 2009 http://dx.doi.org/10.1007/978-3-642-04346-8 978-3-642-04345-1 ECDL Lecture Notes in Computer Science Springer db/conf/ercimdl/ecdl2009.html