Anisotropy of Elastic and Relaxation Properties of the Superconducting 123-YBCO Single Crystal P.P. Pal-Val, L.N. Pal-Val, V.V. Demirsky, V.D. Natsik et M.N. Sorin J. Phys. IV France, 06 C8 (1996) C8-489-C8-492 DOI: 10.1051/jp4:19968106