Junseong Kim Jong-Kyun Hong Dong-Jin Lee Sang-Sun Lee Time stamping method using additional TPU for improvement of positioning precision. 105-106 2012 ICTC https://doi.org/10.1109/ICTC.2012.6386790 conf/ictc/2012 db/conf/ictc/ictc2012.html#KimHLL12