Henk Ernst Blok Vojkan Mihajlovic Georgina Ramírez Thijs Westerveld Djoerd Hiemstra Arjen P. de Vries The TIJAH XML information retrieval system. 725 2006 conf/sigir/2006 SIGIR http://doi.acm.org/10.1145/1148170.1148338 db/conf/sigir/sigir2006.html#BlokMRWHV06