The Boundary Gradient Estimate for Quasilinear Elliptic and Parabolic Differential Equations
Neil Trudinger
Indiana University Mathematics Journal
1972
text
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10.1512/iumj.1972.21.21051
10.1512/iumj.1972.21.21051
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Indiana Univ. Math. J. 21 (1972) 657 - 670
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