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Shevade, SK and Chu, Wei (2006) Minimum enclosing spheres formulations for support vector ordinal regression. In: 6th IEEE International Conference on Data Mining,, Dec 18-22, 2006, Hong Kong, Peoples R China, pp. 1054-1058.
Duan, Kaibo and Keerthi, Sathiya S and Chu, Wei and Shevade, Shirish Krishnaj and Poo, Aun Neow (2003) Multi-category classification by soft-max combination of binary classifiers. In: 4th International Workshop, June 11-13, 2003, Guilford, England, pp. 125-134.