On measurement of electrical conductivity
Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 53 (2013) no. 6, pp. 1004-1007

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A complete uniform asymptotic expansion is found for the integral $\iint_S\nabla^2udxdy$, where u is the solution of the Neumann problem with a delta-function-like derivative on the boundary. A physical application of the result is discussed.
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     author = {A. A. Ershov},
     title = {On measurement of electrical conductivity},
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A. A. Ershov. On measurement of electrical conductivity. Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 53 (2013) no. 6, pp. 1004-1007. http://geodesic.mathdoc.fr/item/ZVMMF_2013_53_6_a12/