IEEE Transactions on Knowledge and Data Engineering
IEEE Transactions on Knowledge and Data Engineering > 2006 > 18 > 6 > 815 - 828
IEEE Transactions on Knowledge and Data Engineering > 2007 > 19 > 2 > 324 - 341
IEEE Transactions on Knowledge and Data Engineering > 2007 > 19 > 2 > 283 - 296
IEEE Transactions on Knowledge and Data Engineering > 2007 > 19 > 3 > 427 - 440