STRUCTURAL AND PHASE CHANGES IN HIGH-TEMPERATURE SUPERCONDUCTING CERAMICS DUE TO LASER RADIATION A.V. STEPANENKO, A.V. ALIFANOV, N.V. RUMAK, T.N. KHATKO, A.A. TOMCHENKO et V.V. KHATKO J. Phys. IV France, 01 C7 (1991) C7-143 DOI: 10.1051/jp4:1991739