“…As is well-known, nonlocal Laplacian boundary value problems model several physical and biological systems where u describes a process which depends on the average of itself, for example, the population density (see [1,4,13,14,34]). In the vast literature on this subject, we also refer the reader to some interesting results obtained by Autuori and Pucci in [5,6,7]studying Kirchhoff equations by using different approaches.…”