“…Discrete boundary value problems (BVPs), associated to equations of type (1), have attracted considerable attention in the last years, especially when they are examined on unbounded domains, see, e.g., [2,4,5,10,11,18,20], the monographies [1,3] and references therein. Equation (1) appears in the discretization process for searching spherically symmetric solutions of certain nonlinear elliptic di¤erential equations with p-Laplacian, see, e.g., [13].…”