KnRuSo1987
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C. Kenig, A. Ruiz, C. Sogge. Uniform Sobolev inequalities and unique continuation theorems for second order constant coefficient differential operators. Duke Math. J, 55 (1987), 329-347. MathSciNet, arXiv.
C. Kenig, A. Ruiz, C. Sogge. Uniform Sobolev inequalities and unique continuation theorems for second order constant coefficient differential operators. Duke Math. J, 55 (1987), 329-347. MathSciNet, arXiv.