Chandrasekar Ramachandran Thanukrishnan Srinivasan An Improved Probabilistic Ant based Clustering for Distributed Databases. 2701-2706 2007 conf/ijcai/2007 IJCAI http://dli.iiit.ac.in/ijcai/IJCAI-2007/PDF/IJCAI07-434.pdf db/conf/ijcai/ijcai2007.html#ChandrasekarS07