no. 1
A class of elliptic differential equations with discontinuous coefficients
Séminaire Brelot-Choquet-Deny. Théorie du potentiel, Tome 6 (1961-1962) no. 1, Exposé no. 4, 23 p. 
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     title = {A class of elliptic differential equations with discontinuous coefficients},
     journal = {S\'eminaire Brelot-Choquet-Deny. Th\'eorie du potentiel},
     note = {talk:4},
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     volume = {6},
     number = {1},
     year = {1961-1962},
     zbl = {0115.31701},
     language = {en},
     url = {http://www.numdam.org/item/SBCD_1961-1962__6_1_A5_0/}
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Morrey, Charles B., Jr. A class of elliptic differential equations with discontinuous coefficients. Séminaire Brelot-Choquet-Deny. Théorie du potentiel, Tome 6 (1961-1962) no. 1, Exposé no. 4, 23 p. http://www.numdam.org/item/SBCD_1961-1962__6_1_A5_0/

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