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(a,b) Periodic and fixed-point solutions for SM90 (with Fμ=1.2 ppm ka1) and (c,d) SM91 (with Fμ=0.5 ppm ka1), near the sub-critical Hopf bifurcation points. The dynamics of SM90 slow down near the unstable fixed point, whereas the limit cycle of SM91 is much more decoupled from the position of the fixed point. (Online version in colour.)
