Debasis Mandal Mayank Gupta Sandipan Dandapat Pratyush Banerjee Sudeshna Sarkar 95-102 2007 CLEF http://dx.doi.org/10.1007/978-3-540-85760-0_12 conf/clef/2007 db/conf/clef/clef2007.html#MandalGDBS07