Some special properties of solutions to obstacle problems
Rendiconti del Seminario Matematico della Università di Padova, Tome 71 (1984), pp. 121-129 
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     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},
     year = {1984},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {71},
     mrnumber = {769431},
     zbl = {0562.35014},
     language = {en},
     url = {https://www.numdam.org/item/RSMUP_1984__71__121_0/}
}
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Maderna, Carla; Salsa, Sandro. Some special properties of solutions to obstacle problems. Rendiconti del Seminario Matematico della Università di Padova, Tome 71 (1984), pp. 121-129. https://www.numdam.org/item/RSMUP_1984__71__121_0/

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