@inproceedings{2009-horizon,
 title = {Sizing the Horizon: The Effects of Chart Size and Layering on the Graphical Perception of Time Series Visualizations},
 author = {Jeffrey Heer AND Nicholas Kong AND Maneesh Agrawala},
 booktitle = {ACM Human Factors in Computing Systems (CHI)},
 year = {2009},
 url = {http://idl.cs.washington.edu/papers/horizon},
}