Jing Wu Lin Li Lei Yi KDD in the Optimization of GSM Network. 97-115 2002 16 Applied Artificial Intelligence 2 http://taylorandfrancis.metapress.com/openurl.asp?genre=article&issn=0883-9514&volume=16&issue=2&spage=97 db/journals/aai/aai16.html#WuLY02