Prokopiv, V.V., et al. “Thermoelectric Properties and a Defective Subsystem of Heterophasic Materials on the Basis of a Lead Telluride With Impurity of Antimony ”. Physics and Chemistry of Solid State, vol. 20, no. 2, July 2019, pp. 149-55, doi:10.15330/pcss.20.2.149-155.