1. Microelectronic circuits;Sedra,1998
2. Analog filter design;Van Valkenburg,1982
3. Passive and active network analysis and synthesis;Budak,1974
4. Oscillator design problem;Anderson;IEEE J Solid-State Circuits,1971
5. Transformation of oscillators using Op Amps, unity gain cells and CFOA;Soliman;Analog Integr Circ S,2010