@misc{tang2004system,
  title = "System and method for providing spatially distributed device interaction",
  author = "Tang, John C and Mordecai, Nicole Y and Begole, James MA and Li, Francis C and Van Kleek, Max G and Bhalodia, Janak R",
  year = "2004",
  month = "sep~14",
  note = "US Patent 6,791,583",
}