Ka Hyung Choi Won-Sang Ra So-Young Park Jin Bae Park Robust Least Squares Approach to Passive Target Localization Using Ultrasonic Receiver Array. 1993-2002 2014 61 IEEE Trans. Ind. Electron. 4 https://doi.org/10.1109/TIE.2013.2266076 db/journals/tie/tie61.html#ChoiRPP14