Tran, Thi Thuy Quynh and Nguyen, Linh Trung and Phan, Anh and Karim, Abed Meraim  (2012) On Optimization of Antennas without Phase Center for DOA estimation.  In: The 4th International Conference on Communications and Electronics (ICCE), 1-3 August 2012, Hue, Vietnam.