Ceccarelli, Diego and Gordea, Sergiu and Lucchese, Claudio and Nardini, Franco Maria and Tolomei, Gabriele  Improving Europeana Search Experience Using Query Logs.   In:  Research and Advanced Technology for Digital Libraries.   Lecture Notes in Computer Science  (6966).  Springer, pp. 384-395.  ISBN 978-3-642-24469-8      (2011)