He i in the central giant H ii region of NGC 5253 - A 2D observational approach to collisional and radiative transfer effectsA. Monreal-Ibero, J. R. Walsh, M. S. Westmoquette and J. M. VílchezA&A, 553 (2013) A57DOI: https://doi.org/10.1051/0004-6361/201321387
