[22] T. Yoshizawa, Stability Theory and the Existence of Periodic Solutions and Almost Periodic Solu- tions, Springer-Verlag, New-York, Heidelberg, Berlin, 1975. [23] M.J. Feigenbaum, Universal behavior in nonlinear systems, Los Alamos Science 1 (1980) 4–27. [24] E. Sander, J.A. Yorke, Connecting period-doubling cascades to chaos, Int. J. Bifurcat. Chaos 22 (2012) 1250022. [25] H. Haken, Analogy between higher instabilities in fluids and lasers, Phys. Lett. A 53 (1975) 77–78. [26] N.M. Lawandy, K. Lee, Stability analysis of two coupled Lorenz lasers and the coupling-induced periodic → chaotic transition, Opt. Commun. 61 (1987) 137–141. 14