Haiqin Yang Kaizhu Huang Irwin King Michael R. Lyu Efficient Minimax Clustering Probability Machine by Generalized Probability Product Kernel. 4014-4019 2008 IJCNN http://dx.doi.org/10.1109/IJCNN.2008.4634375 conf/ijcnn/2008 db/conf/ijcnn/ijcnn2008.html#YangHKL08