Crystal-chemical structure and electrical conductivity of HTSC – cuprates under conditions of variation of defective composition and exposure to high-energy irradiation (literature... by G.Ya. Khadzhai, Yu.V. Litvinov, R.V. Vovk, N.M. Zavgorodnaja, V.Yu. Grec, K.A. Kotvitskaya, I.M. Chursina, O.V. Botsula, K.I. Prikhod’ko, S.N. Kamchatna