no. 3
An L p -estimate for the gradient of solutions of second order elliptic divergence equations
Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche, Série 3, Tome 17 (1963) no. 3, pp. 189-206. 
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     author = {Meyers, Norman G.},
     title = {An $L^p$-estimate for the gradient of solutions of second order elliptic divergence equations},
     journal = {Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche},
     pages = {189--206},
     publisher = {Scuola normale superiore},
     volume = {Ser. 3, 17},
     number = {3},
     year = {1963},
     mrnumber = {159110},
     zbl = {0127.31904},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1963_3_17_3_189_0/}
}
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Meyers, Norman G. An $L^p$-estimate for the gradient of solutions of second order elliptic divergence equations. Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche, Série 3, Tome 17 (1963) no. 3, pp. 189-206. http://www.numdam.org/item/ASNSP_1963_3_17_3_189_0/

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