Publication Surface tension sound in superfluid helium films adsorbed on alumina powder Ralph Rosenbaum, G. A. Williams, David Heckerman, J. Marcus, D. Scholler, J. Maynard, I. Rudnick Journal of Low Temperature Physics | December 1979, Vol 37(5): pp. 663-678
Publication Superfluid Two-Phase Sound Seth Putterman, David Heckerman, Ralph Rosenbaum, Gary Williams Physical Review Letters | February 1979, Vol 42(9): pp. 580-583
