@article{Heer:2009:SHT,
  title = {Sizing the Horizon: The Effects of Chart Size and Layering on the Graphical Perception of Time Series Visualizations},
  journal = {ACM Human Factors in Computing Systems (CHI)},
  author = {Jeffrey Heer and Nicholas Kong and Maneesh Agrawala},
  month = {},
  year = 2009,
  pages = {},
  url = {http://graphics.berkeley.edu/papers/Heer-SHT-2009-00/},
}