Citation: Machida, M.; Katsui, A.; Achiwa, N.; Shibuya, I.; Hikita, M.; Koyano, N. (1988). Structural investigations on high-Tc superconducting untwinned Dy Ba2 Cu3 O7-y single crystal by X-Ray diffraction.. Japanese Journal of Applied Physics, Part 2, 27, pp. 1866-1868.