@ARTICLE{zhang_tvcg14,
  AUTHOR =       "Zhiyuan Zhang and Kevin T. McDonnell and Erez Zadok and Klaus Mueller",
  TITLE =        "Visual Correlation Analysis of Numerical and Categorical Data on the Correlation Map",
  JOURNAL =      "IEEE Transactions on Visualization and Computer Graphics (TVCG)",
  YEAR =         "2015",
  MONTH =        "February",
  VOLUME =       "21",
  NUMBER =       "2",
}