SUPERFLUID MASS IN VERY THIN OF FILM HELIUM ADSORBED ON VYCOR GLASS E.N. Smith, D.J. Bishop, J.E. Berthold et J.D. Reppy J. Phys. Colloques, 39 C6 (1978) C6-342-C6-343 DOI: 10.1051/jphyscol:19786152