@article{MTA_2017_2_1_a7,
     author = {Biagio Ricceri},
     title = {On a minimax theorem: an improvement, a new proof and an overview of its applications},
     journal = {Minimax theory and its applications},
     year = {2017},
     volume = {2},
     number = {1},
     zbl = {1366.49009},
     url = {http://geodesic.mathdoc.fr/item/MTA_2017_2_1_a7/}
}