@article{MTA_2019_4_1_a1,
     author = {Giovanni Anello and Luca Furnari},
     title = {A multiplicity result for a non-autonomous sublinear elliptic problem involving nonlinearities indefinite in sign},
     journal = {Minimax theory and its applications},
     year = {2019},
     volume = {4},
     number = {1},
     zbl = {1422.35067},
     url = {http://geodesic.mathdoc.fr/item/MTA_2019_4_1_a1/}
}