Evidence of a Mira-like tail and bow shock about the semi-regular variable V CVn from four decades of polarization measurementsHilding R. Neilson, Richard Ignace, Beverly J. Smith, Gary Henson and Alyssa M. AdamsA&A, 568 (2014) A88DOI: https://doi.org/10.1051/0004-6361/201424037