W. Metzler et al., ON THE PARAMETER PLANE OF NONLINEAR COUPLED OSCILLATORS, Zeitschrift fur Naturforschung. A, A journal of physical sciences, 48(5-6), 1993, pp. 655-662
Two well-known bifurcation routes to chaos of two-dimensional coupled
logistic maps are embedded in a two-parameter plane of a canonical non
linear oscillator which contains a non-analytic analogon to the Mandel
brot set.