XuanLong Nguyen Ling Huang Anthony D. Joseph Support Vector Machines, Data Reduction, and Approximate Kernel Matrices. 137-153 2008 ECML/PKDD (2) http://dx.doi.org/10.1007/978-3-540-87481-2_10 conf/pkdd/2008-2 db/conf/pkdd/pkdd2008-2.html#NguyenHJ08