Citation: Uchinokura, K.; Izumi, M.; Maeda, A.; Yabe, T.; Tanaka, S. (1987). Superconductivity, crystal structure and orthorhombictetragonal phase transition in 90 K superconductor orthorhombic La Ba2 Cu3 Oy. Japanese Journal of Applied Physics, 26, pp. 2109-2110.