@article{RSMUP_1984__71__121_0,
     author = {Maderna, Carla and Salsa, Sandro},
     title = {Some special properties of solutions to obstacle problems},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {121--129},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {71},
     year = {1984},
     mrnumber = {769431},
     zbl = {0562.35014},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1984__71__121_0/}
}