Lien-Wu Chen Yu-Hao Peng Yu-Chee Tseng An augmented reality based group communication system for bikers using smart phones. 325-327 2011 PerCom Workshops https://doi.org/10.1109/PERCOMW.2011.5766896 https://doi.ieeecomputersociety.org/10.1109/PERCOMW.2011.5766896 conf/percom/2011w db/conf/percom/percomw2011.html#ChenPT11