Heremans, J., & Hansen, OP. (1983). Temperature-dependence of Excess Carrier Density and Thermopower in Tin-doped Bismuth - Pseudo-parabolic Model. Journal of Physics C: Solid State Physics, 16(23), 4623-4636. https://doi.org/10.1088/0022-3719/16/23/022 (Original work published 1983)