“Diffusion of oxygen in superconducting YBa2Cu 3O7-d ceramic oxides (0 < b < 0.8)", K. N. Tu, N.-C. Yeh, S. I. Park, and C. C. Tsuei, Phys. Rev. B 39, 304, (1989). http://journals.aps.org/prb/abstract/10.1103/PhysRevB.39.304
“Diffusion of oxygen in superconducting YBa2Cu 3O7-d ceramic oxides (0 < b < 0.8)", K. N. Tu, N.-C. Yeh, S. I. Park, and C. C. Tsuei, Phys. Rev. B 39, 304, (1989). http://journals.aps.org/prb/abstract/10.1103/PhysRevB.39.304