INTERFACIAL TENSION OF 3He - 4He LIQUID MIXTURES UNDER PRESSURE L.S. Balfour, J. Landau, S.G. Lipson and J. Pipman J. Phys. Colloques, 39 C6 (1978) C6-203-C6-204 DOI: 10.1051/jphyscol:1978690