Accurate galactic 21-cm H I measurements with the NRAO Green Bank TelescopeA. I. Boothroyd, K. Blagrave, F. J. Lockman, P. G. Martin, D. Pinheiro Gonçalves and S. SrikanthA&A, 536 (2011) A81DOI: https://doi.org/10.1051/0004-6361/201117656