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In memory of Nestor Rivière
The first author was partially supported by National Science Foundation grant MPS-75-06489. The second was partially supported by an NSF grant MCS 76-07039 and by a grant from the Office of Naval Research, N00014-76-C-0439. The third was partially supported by NSF grant MPS 75-06490 and by a Sloan Foundation Grant to the Courant Institute.
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Kinderlehrer, D., Nirenberg, L. & Spruck, J. Regularity in elliptic free boundary problems I. J. Anal. Math. 34, 86–119 (1978). https://doi.org/10.1007/BF02790009
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DOI: https://doi.org/10.1007/BF02790009