Paul, Tapas Kumar, and Radha Raman Pal. “New Electronically Tunable Third Order Filters and Dual Mode Sinusoidal Oscillator Using VDTAs and Grounded Capacitors”. Advances in Technology Innovation 6, no. 4 (September 1, 2021): 262-281. Accessed October 25, 2021. https://ojs.imeti.org/index.php/AITI/article/view/7592.