Kien, N. T., P. D. Chinh, and N. T. H. Duyen. “Polarization Versus Mori-Tanaka Approximations for Effective Conductivity of Isotropic Composites”. Vietnam Journal of Mechanics, vol. 40, no. 1, Mar. 2018, pp. 79-87, doi:10.15625/0866-7136/10572.