Alan Chia-Lung Chen Shang Gao Reda Alhajj Panagiotis Karampelas Heuristic based approach to clustering and its time critical applications. 37-42 2010 IRI http://dx.doi.org/10.1109/IRI.2010.5558969 conf/iri/2010 db/conf/iri/iri2010.html#ChenGAK10