Chunhua Zhang Yuan-Hai Shao 0001 Junyan Tan Naiyang Deng Mixed-norm linear support vector machine. 2159-2166 2013 23 Neural Comput. Appl. 7-8 https://doi.org/10.1007/s00521-012-1166-0 db/journals/nca/nca23.html#ZhangSTD13