@TECHREPORT{APEX-TR-2011-07-11,
      AUTHOR = "Chen, Tianqi and Zheng, Zhao and Lu, Qiuxia and Zhang, Weinan and Yu, Yong",
      INSTITUTION = "Apex Data \& Knowledge Management Lab, Shanghai Jiao Tong University",
      TITLE = "Feature-Based Matrix Factorization",
      NUMBER = "APEX-TR-2011-07-11",
      YEAR = "2011",
      MONTH = "July",
}