D'Aguì Giuseppina and Heidarkhani Shapour and Sciammetta Angela: Infinitely many solutions for a class of quasilinear two-point boundary value systems. (2015)
D'Aguì Giuseppina and Heidarkhani Shapour and Molica Bisci Giovanni: Multiple solutions for a perturbed mixed boundary value problem involving the one-dimensional p-Laplacian. (2013)