SURFACE DEFORMATION AND SURFACE MOTION DUE TO STANDING SECOND SOUND WAVES IN HELIUM I I S.G. Eckstein, Y. Eckstein, J.L. Olsen et H. Sigg J. Phys. Colloques, 39 C6 (1978) C6-316-C6-317 DOI: 10.1051/jphyscol:19786140