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Research conducted in part while visiting Indiana University.
Research supported in part by a grant from the National Science Foundation.
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Kilpeläinen, T., Ziemer, W.P. Pointwise regularity of solutions to nonlinear double obstacle problems. Ark. Mat. 29, 83–106 (1991). https://doi.org/10.1007/BF02384333
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DOI: https://doi.org/10.1007/BF02384333