Habib AmmariHyeonbae KangHigh-Order Terms in the Asymptotic Expansions of the Steady-State Voltage Potentials in the Presence of Conductivity Inhomogeneities of Small Diameter.1152-1166200334SIAM J. Math. Anal.5https://doi.org/10.1137/S0036141001399234db/journals/siamma/siamma34.html#AmmariK03