Superfluid ³He Confined in a Single 0.6 Micron Slab: A Phase Transition Between Superfluid Phases with Hysteresis

L. V. Levitin, R. G. Bennett, A. J. Casey, B. Cowan, J. Parpia, J. Saunders

J. Low Temp. Phys. 158 159-163 (2010) 

Pub164.pdf