Geodesic
Prior estimates of the first derivatives for two-dimensional quasi-linear strongly elliptic systems
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Boundary value problems of mathematical physics. Part 4, Tome 92 (1966), pp. 192-202 
A. P. Oskolkov. Prior estimates of the first derivatives for two-dimensional quasi-linear strongly elliptic systems. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Boundary value problems of mathematical physics. Part 4, Tome 92 (1966), pp. 192-202. http://geodesic.mathdoc.fr/item/TM_1966_92_a12/
@article{TM_1966_92_a12,
     author = {A. P. Oskolkov},
     title = {Prior estimates of the first derivatives for two-dimensional quasi-linear strongly elliptic systems},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {192--202},
     year = {1966},
     volume = {92},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1966_92_a12/}
}
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%D 1966
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%F TM_1966_92_a12

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