Prasenjit Majumder Mandar Mitra Dipasree Pal Bulgarian, Hungarian and Czech Stemming Using YASS. 49-56 2007 CLEF http://dx.doi.org/10.1007/978-3-540-85760-0_6 conf/clef/2007 db/conf/clef/clef2007.html#MajumderMP07