Kondrik, A., G. Kovtun, O. Shcherban, and D. Solopikhin. “Estimating Purity of Cd, Zn, Pb by Non-Contact Measurement of Specific Electrical Resistance at Liquid Nitrogen Temperature”. Technology and Design in Electronic Equipment, no. 4–6, Dec. 2022, pp. 46-51, doi:10.15222/TKEA2022.4-6.46.