Nantakan Wongkasem และ David Flores. (2017) Low loss three-dimensional metamaterial-based omega-net microwave lens. <i>Engineering and Applied Science Research</i>, <i>44</i>(2), 106-110.Nantakan Wongkasem และ David Flores. "Low loss three-dimensional metamaterial-based omega-net microwave lens". Engineering and Applied Science Research 44 (2017):106-110.Nantakan Wongkasem และ David Flores. Low loss three-dimensional metamaterial-based omega-net microwave lens. Faculty of Engineering, Khon Kaen University:ม.ป.ท. 2017.