ANOMALOUS ELASTIC SOFTENING OF POLYCRYSTALLINE Nb3Sn BELOW THE MARTENSITIC TRANSFORMATION TEMPERATURE J.F. Bussière, B. Faucher et C.L. Snead J. Phys. Colloques, 43 C4 (1982) C4-363-C4-368 DOI: 10.1051/jphyscol:1982452