1. Principles of Coherent Communications;Viterbi,1966
2. Phaselock Technique;Gardner,1979
3. Synchronization Systems in Communication and Control;Lindsey,1972
4. False lock and bifurcation in the phase locked loop;Stensby;SIAM J. Appl. Math.,1987
5. A New Theory of Bifurcation in Second-Order, Type I PLLs;Stensby,1993