  Non-minimally coupled theories of special potentials are analyzed
numerically. Such theories yield equations of state $\omega<-1$ and
oscillations of the cosmological expansion, which are favored by the recent
analysis of observations. Fitting these theories to the Gold SnIa dataset, we
obtain results comparable with other models. A potential of the form
$V(\phi)=V_0e^{a_1\phi^2}$ yields $\chi^2_{min}=170.127$. Similar results are
obtained for potentials of the form $V(\phi)=V_0+a_1\phi^n$.
