@article{MTA_2017_2_1_a4,
     author = {Antonio Greco},
     title = {Convex functions over the whole space locally satisfying fractional equations},
     journal = {Minimax theory and its applications},
     year = {2017},
     volume = {2},
     number = {1},
     zbl = {1371.35325},
     url = {http://geodesic.mathdoc.fr/item/MTA_2017_2_1_a4/}
}