@article{MTA_2019_4_1_a2,
     author = {Rossella Bartolo and Eduardo Colorado,Giovanni Molica Bisci},
     title = {Perturbed {Problems} {Involving} the {Square} {Root} of the {Laplacian}},
     journal = {Minimax theory and its applications},
     year = {2019},
     volume = {4},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/MTA_2019_4_1_a2/}
}