Tibério S. Caetano Julian John McAuley Li Cheng Quoc V. Le Alexander J. Smola 1048-1058 2009 31 IEEE Trans. Pattern Anal. Mach. Intell. 6 http://dx.doi.org/10.1109/TPAMI.2009.28 db/journals/pami/pami31.html#CaetanoMCLS09