@article{MTA_2022_7_1_a3,
     author = {Lingju Kong and Roger Nichols},
     title = {Multiple {Weak} {Solutions} of {Biharmonic} {Systems}},
     journal = {Minimax theory and its applications},
     year = {2022},
     volume = {7},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/MTA_2022_7_1_a3/}
}