Kazumi Saito Nobuaki Mutoh Tetsuo Ikeda Toshinao Goda Kazuki Mochizuki Improving Search Efficiency of Incremental Variable Selection by Using Second-Order Optimal Criterion. 41-49 2008 KES (3) http://dx.doi.org/10.1007/978-3-540-85567-5_6 conf/kes/2008-3 db/conf/kes/kes2008-3.html#SaitoMIGM08