Savich, S. V., A. V. Samoilov, A. L. Samsonik, V. N. Sukhov, K. V. Tiutierieva, and R. V. Vovk. 2015. “Fluctuation Conductivity of Hafnium Doped YBa2Cu3O7-δ Ceramic”. Journal of V. N. Karazin Kharkiv National University. Series Physics 1158 (22), 45-47. https://periodicals.karazin.ua/physics/article/view/7800.