Michael Mozer Richard H. Wolniewicz David B. Grimes Eric Johnson Howard Kaushansky Churn Reduction in the Wireless Industry. 935-941 http://nips.djvuzone.org/djvu/nips12/0935.djvu 1999 conf/nips/1999 NIPS db/conf/nips/nips1999.html#MozerWGJK99