1. W.F. Egan, “Frequency synthesis by Phase Lock”, J. Wiley and Sons, New York, USA, 1981
2. A.A. Abidi, “Radio-frequency integrated circuits for portable communications”, Proc. Of the IEEE Custom Integrated Circuits Conference (CICC 94), pp. 151–158, 1994.
3. B. Razavi, “Challenges in the design of frequency synthesizers for wireless applications”, Proc. Of the IEEE Custom Integrated Circuits Conference (CICC 97), pp. 151–158, 1997.
4. J. Craninckx, “Low-phase-noise fully integrated CMOS frequency synthesizers”, Ph.D. Dissertation, Katholieke Universiteit Leuven, 1997.
5. P. Kinget, “Integrated GHz Voltage Controlled Oscillators”, Analog Circuit Design, (W.Sansen, J.H.Huijsing and R.J. van de Plassche, eds), pp.353–381, New York: Kluwer Academic Publishers, 1999.