A regularity result for polyharmonic variational inequalities with thin obstacles
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 11 (1984) no. 1, pp. 87-122. 
@article{ASNSP_1984_4_11_1_87_0,
     author = {Schild, Bernhard},
     title = {A regularity result for polyharmonic variational inequalities with thin obstacles},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {87--122},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 11},
     number = {1},
     year = {1984},
     mrnumber = {752581},
     zbl = {0554.49003},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1984_4_11_1_87_0/}
}
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Schild, Bernhard. A regularity result for polyharmonic variational inequalities with thin obstacles. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 11 (1984) no. 1, pp. 87-122. http://www.numdam.org/item/ASNSP_1984_4_11_1_87_0/

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