Freik, D.M., and L.V. Turovska. 2014. “Crystal-Quasichemical Analysis of Defect Subsystem of Doped PbTe: Sb Crystals and Pb-Sb-Te Solid Solutions”. Journal of Vasyl Stefanyk Precarpathian National University 1 (1):55-63. https://doi.org/10.15330/jpnu.1.1.55-63.