3. Correlation of inhomogeneities in the superconducting properties with the variation of the lattice parameter C in nontwinning YBa2Cu3−zAlyO6+x crystals [Text] / A. Belyaeva, V. Yur'ev, A. Foshchan, E. Golovenchits, N. Morozov, I. Shul'pina, M. Shcheglov // Fizika Tverdogo Tela. - 1991. - Vol. 33 Issue 10.- P2896-2906