Anisotropy of thermoelectric properties of r-type nanostructured material based on (Bi, Sb)2Te3 - I. A. Drabkin; V. B. Osvenski; Yu. N. Parkhomenko; A. I. Sorokin; G. I. Pivovarov; L. P. Bulat (Journal of thermoelectricity, 2013)