Savich, C. V. .; Samojlov, O. V. .; Kurbanov, U. .; Solovjov, A. L. .; Vovk, R. V. . Excess Conductivity of HTSC Ceramics YBa₂Cu₃O_7–δ With TiO₂ Impurities. Fiz. Nizk. Temp. 2022, 48, 878–883.