Ismail Sengör Altingövde Rifat Ozcan Huseyin Cagdas Ocalan Fazli Can Özgür Ulusoy Large-scale cluster-based retrieval experiments on Turkish texts. 891-892 2007 conf/sigir/2007 SIGIR http://doi.acm.org/10.1145/1277741.1277961 db/conf/sigir/sigir2007.html#AltingovdeOOCU07