Hyuntae Cho Yeonsu Jung Hoon Choi Hyunsung Jang Sanghyun Son Yunju Baek Precise location tracking system based on time difference of arrival over LR-WPAN. 67-72 2008 MELT http://doi.acm.org/10.1145/1410012.1410028 conf/mobicom/2008melt db/conf/mobicom/melt2008.html#ChoJCJSB08