[1] K. Engelborghs, T. Luzyanina, K. J. iń t Hout and D.
Roose, Collocation methods for the computation of periodic solutions
of delay differential equations, SIAM J. Sci. Comput. 22 (2000),
1593-1609.
[2] K. P. Hadeler, Effective computation of periodic orbits and
bifurcation diagram in delay equations, Numer. Math. 34 (1980),
457-467.
[3] K. J. iń t Hout and Ch. Lubich, Periodic orbits of delay
differential equations under discretization, BIT 38 (1998), 72-91.
[4] M. Martelli, Periodic solutions of some nonlinear
delay-differential equations, J. Math. Anal. Appl. 74 (1980),
494-503.
[5] H. I. Freedman and J. Wu, Periodic solutions of single species
models with periodic delay, SIAM J. Math. Anal. 23 (1992), 689-701.
[6] T. Faria and L. T. Mahalháes, Normal forms for retarded
functional differential equations with parameters and applications to
Hopf bifurcation, J. Diff. Equation 122 (1995), 181-200.
[7] Z. Liu, P. Magal and S. Ruan, Hopf bifurcation for non-densely
defined Cauchy problems, Zeitschrift fur Angewandte Mathematik und
Physik 62 (2011), 191-222.
[8] S. J. Guo and J. H. Wu, Generalized Hopf bifurcation in delay
differential equations (in Chinese), Sci. Sin. Math. 42 (2012),
91-105.
[9] Z. H. Yang and Q. Guo, Bifurcation analysis of delayed logistic
equation, Applied Mathematics and Computation 167 (2005), 454-476.
[10] P. Chossat and M. Golubitsky, Hopf bifurcation in the presence of
symmetry, center manifold and Liapunov-Schmidt reduction, Oscillations
Bifurcation and Chaos 8 (1987), 343-352.
[11] S. L. Chang, C. S. Chien and B. W. Jeng, Liapunov-Schmidt
reduction and continuation for nonlinear Schrödinger equations, SIAM
Journal on Scientific Computing 29 (2007), 729-755.
[12] B. Temple and R. Young, A Liapunov-Schmidt reduction for
time-periodic solutions of the compressible Euler equations, Methods
and Applications of Analysis 17 (2010), 225-262.
[13] B. Hassard, D. Kazarino and Y. Wan, Theory and Applications of
Hopf Bifurcation, Cambridge University Press, Cambridge, 1981.