[1]
R. Sotner, J. Jerabek, J. Petrzela, N. Herencsar, R. Prokop, and K. Vrba, “Second-Order Simple Multiphase Oscillator Using Z-Copy Controlled-Gain Voltage Differencing Current Conveyor”, ELEKTRON ELEKTROTECH, vol. 20, no. 9, pp. 13-18, Nov. 2014.