Bastien, G. .; Rogalski, M. . Difference Equations on $\mathbb{R}_*^+$, of the Form $u_{n+2}=\frac{f(u_{n+1})}{u_n+\lambda}$, $\lambda>0$, With Applications to Perturbations of Dynamical Systems. sjm 2024, 18, 63-82.