COMPARISON OF THE ELECTRON MOMENTUM DISTRIBUTION OF SOLID AND LIQUID NI AS MEASURED BY POSITRONS M.J. Fluss, L.C. Smedskjaer et M.K. Chason J. Phys. Colloques, 41 C8 (1980) C8-443-C8-446 DOI: 10.1051/jphyscol:19808111