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Summart, S. , Saetiaw, C. , Thosdeekoraphat, T. , Thongsopa, C.. "First Order Filter Based Current-Mode Sinusoidal Oscillators Using Current Differencing Transconductance Amplifiers (CDTAs) ". World Academy of Science, Engineering and Technology, Open Science Index 91, International Journal of Electronics and Communication Engineering, (2014), 8(7), 1069 - 1073.