@article{10_4064_ap_56_1_49_61,
     author = {Leszek G\k{e}ba and Tadeusz Pruszko},
     title = {Some applications of minimax and topological degree to the study of the {Dirichlet} problem for elliptic partial differential equations},
     journal = {Annales Polonici Mathematici},
     pages = {49--61},
     publisher = {mathdoc},
     volume = {56},
     number = {1},
     year = {1991},
     doi = {10.4064/ap-56-1-49-61},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-56-1-49-61/}
}