@article{ASNSP_1984_4_11_1_123_0, author = {Sakaguchi, Shigeru}, title = {Star shaped coincidence sets in the obstacle problem}, journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze}, pages = {123--128}, publisher = {Scuola normale superiore}, volume = {Ser. 4, 11}, number = {1}, year = {1984}, zbl = {0539.49004}, mrnumber = {752582}, language = {en}, url = {archive.numdam.org/item/ASNSP_1984_4_11_1_123_0/} }
Sakaguchi, Shigeru. Star shaped coincidence sets in the obstacle problem. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 11 (1984) no. 1, pp. 123-128. http://archive.numdam.org/item/ASNSP_1984_4_11_1_123_0/
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