first three harmonics: $\omega_{1_{UCE}}=0.212\ c/\rm{fm}$, $\omega_{2_{UCE}}=0.318\ c/\rm{fm}$, and $\omega_{3_{UCE}}=0.424\ c/\rm{fm}$, can be easily traced down in Figure \[fig:4\].

As for the “window” of intermittency at $L = 0$, we obtained: $T_{0_{int}} \approx 590/12 = 49.2\ \rm{fm}/c$ (Fig. 2 - [@felea-09a] and central plot of current Fig. \[fig:2\]). This gives the corresponding fundamental frequency: $\omega_{0_{int}}=0.128\ c/\rm{fm}$ and its associated harmonics: $\omega_{1_{int}}=0.256\ c/\rm{fm}$, $\omega_{2_{int}}=0.384\ c/\rm{fm}$, and $\omega_{3_{int}}=0.512\ c/\rm{fm}$ (Fig. \[fig:5\]).

Shannon entropies
-----------------

In order to further investigate route to chaos, we paid attention to the time evolution of the generalized informational entropy (or Shannon entropy), introduced as usually :

$$S_{Shannon}\left(t\right)=-{\sum^{N\left(t\right)}_{k=1}} p_k \cdot \ln p_k,$$

$N\left(t\right)$ being the number of gradually occupied cells until the time $t$.

This type of entropy is actually a number which quantifies the time rate of information production for a chaotic trajectory [@ott-93]. We consider in the first place the case of a particle that at every moment occupies a cell of the two-dimensional lattice phase space with a $p_k$ probability:

$$p_k=1/N_{total\ cells},$$

where:

$$N_{total\ cells}=N_{r} \cdot N_{p_{r}} \cdot N_{\theta},$$

$N_{r}$, $N_{p_{r}}$, and $N_{\theta}$ are the number of bins of the $\left( r,p_{r},\theta\right)$ lattice. For $p_{\theta}$ is a constant of motion for the monopole and the [UCE]{} 