David B. Leake Raja Sooriamurthi When Two Case Bases Are Better than One: Exploiting Multiple Case Bases. 321-335 2001 conf/iccbr/2001 ICCBR http://dx.doi.org/10.1007/3-540-44593-5_23 db/conf/iccbr/iccbr2001.html#LeakeS01