@inproceedings{2010-crowdsourcing-graphical-perception,
  title = {Crowdsourcing Graphical Perception: Using Mechanical Turk to Assess Visualization Design},
  author = {Jeffrey Heer AND Michael Bostock},
  booktitle = {ACM Human Factors in Computing Systems (CHI)},
  year = {2010},
  pages = {203--212},
  url = {http://vis.stanford.edu/papers/crowdsourcing-graphical-perception}
}