Summart, S. , Saetiaw, C. , Thosdeekoraphat, T. , Thongsopa, C. (2014), '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, 8(7), 1069 - 1073.