Geodesic
Sufficient conditions for the concavity of the solution of the dirichlet problem for the equation $\Delta u=-1$
Matematičeskie zametki, Tome 42 (1987) no. 4, pp. 537-542.

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     author = {A. A. Kosmodem'yanskii (Jr.)},
     title = {Sufficient conditions for the concavity of the solution of the dirichlet problem for the equation $\Delta u=-1$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {537--542},
     publisher = {mathdoc},
     volume = {42},
     number = {4},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1987_42_4_a5/}
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A. A. Kosmodem'yanskii (Jr.). Sufficient conditions for the concavity of the solution of the dirichlet problem for the equation $\Delta u=-1$. Matematičeskie zametki, Tome 42 (1987) no. 4, pp. 537-542. http://geodesic.mathdoc.fr/item/MZM_1987_42_4_a5/