Bo Chen Wai Lam Ivor Tsang Tak-Lam Wong A Semi-Supervised Framework for Feature Mapping and Multiclass Classification. 341-352 2009 SDM http://www.siam.org/proceedings/datamining/2009/dm09_034_chenb.pdf conf/sdm/2009 db/conf/sdm/sdm2009.html#ChenLTW09