Chang, Chih-Chung; Lin, Chih-Jen (2011). "LIBSVM: A library for support vector machines". ACM Transactions on Intelligent Systems and Technology. 2 (3). doi:10.1145/1961189.1961199. S2CID961425.
Rifkin, Ryan (2002). Everything Old is New Again: a Fresh Look at Historical Approaches in Machine Learning (Ph.D. Thesis). Massachusetts Institute of Technology. p. 18. hdl:1721.1/17549.
Chang, Chih-Chung; Lin, Chih-Jen (2011). "LIBSVM: A library for support vector machines". ACM Transactions on Intelligent Systems and Technology. 2 (3). doi:10.1145/1961189.1961199. S2CID961425.