@misc{39926,
  author = {Mitch Trachtenberg},
  title = {Development of Appropriate Test Markings for Optical Scan Voting Machines, Phase 2: Analysis of Ballot Markings},
  year = {2012},
  month = {2012-01-05},
  publisher = {Grant/Contract Reports (NISTGCR), National Institute of Standards and Technology, Gaithersburg, MD},
  language = {en},
}