Jain, Manoj Kumar, and Amrita Singh. “Novel Active-C Voltage-Mode Quadrature Oscillator Realization Employing CCCIIs”. International Journal of Integrated Engineering, vol. 14, no. 4, June 2022, pp. 332-8, https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/9367.