Im. Khalatnikov et Ay. Kamenshchik, Remarks about the effective conductivity of some three-color tesselations in the plane, JETP LETTER, 72(6), 2000, pp. 341-344
The asymptotic formula for the effective conductivity of isotropic three-co
lor (three-conductivity) rhombic tesselation in the plane is obtained for t
he case when one conductivity is much smaller than the other two. The tenta
tive formula for this rhombic tesselation is suggested and discussed. (C) 2
000 MAIK "Nauka / Interperiodica".