Ching-Huang Yun Kun-Ta Chuang Ming-Syan Chen Self-Tuning Clustering: An Adaptive Clustering Method for Transaction Data. 42-51 2002 conf/dawak/2002 DaWaK http://link.springer.de/link/service/series/0558/bibs/2454/24540042.htm db/conf/dawak/dawak2002.html#YunCC02