Galactic cosmic rays measured by UVS on Voyager 1 and the end of the modulation - Is the upwind heliopause a collapsed charge-exchange layer?R. Lallement, J. L. Bertaux, E. Quémerais and B. R. SandelA&A, 563 (2014) A108DOI: https://doi.org/10.1051/0004-6361/201322705