IEEE Transactions on Knowledge and Data Engineering
IEEE Transactions on Knowledge and Data Engineering > 2008 > 20 > 9 > 1168 - 1180
IEEE Transactions on Knowledge and Data Engineering > 2008 > 20 > 9 > 1264 - 1272
IEEE Transactions on Knowledge and Data Engineering > 2008 > 20 > 9 > 1230 - 1238