MECHANICAL AND THERMODYNAMICAL STUDY OF A MACROSCOPICALLY COHERENT PHASE TRANSITION. CASE OF THE MARTENSITIC TRANSFORMATION J.F. GANGHOFFER, S. DENIS, E. GAUTIER, A. SIMON, K. SIMONSSON et S. SJÖSTRÖM J. Phys. IV France, 01 C4 (1991) C4-89-C4-94 DOI: 10.1051/jp4:1991413