Wang, X., Guo, K., Veremchuk, I., Burkhardt, U., Feng, X., Grin, J., et al. (2015). Thermoelectric properties of Eu- and Na-substituted SnTe. Journal of Rare Earths, 33(11), 1175-1181. doi:10.1016/S1002-0721(14)60543-3.