Mingmin Chi Youdong Miao Youze Tang Jon Atli Benediktsson Xuanjing Huang Hierarchical Ensemble Support Cluster Machine. 252-261 2009 MCS http://dx.doi.org/10.1007/978-3-642-02326-2_26 conf/mcs/2009 db/conf/mcs/mcs2009.html#ChiMTBH09