KNOWLEDGE-BASED SYSTEMS, vol. 24, no. 7, page. 1120 - 1130, 2011-10
ReCALL, vol. 23, no. 1, page. 25 - 58, 2011-01
IEICE Transactions on Information and Systems, vol. E97-D, no. 7, page. 1830 - 1841, 2014-07