1. Symmetry-breaking and first period-doubling following a Hopf bifurcation in a three dimensional system,;M. Belhaq;Mechanics Research Communication,1995
2. Analytical prediction of the two first period-doublings in a three dimensional system,;M. Belhaq;International Journal of Bifurcation and Chaos,2000
3. Asymptotics of homoclinic bifurcation in a three dimensional system,;M. Belhaq;Nonlinear Dynamics,2000
4. On perturbation procedure for limit cycle analysis,;S. H. Chen;International Journal of Nonlinear Mechanics,1991
5. Application of the incremental harmonic balance method to cubic nonlinearity systems,;Y. K. Cheung;Journal of Sound and Vibration,1990