Rong-En Fan Kai-Wei Chang Cho-Jui Hsieh Xiang-Rui Wang Chih-Jen Lin LIBLINEAR: A Library for Large Linear Classification. 1871-1874 2008 9 Journal of Machine Learning Research http://doi.acm.org/10.1145/1390681.1442794 db/journals/jmlr/jmlr9.html#FanCHWL08