On the origin of [Ne II] emission in young stars: mid-infrared and optical observations with the Very Large TelescopeC. Baldovin-Saavedra, M. Audard, A. Carmona, M. Güdel, K. Briggs, L. M. Rebull, S. L. Skinner and B. ErcolanoA&A, 543 (2012) A30DOI: https://doi.org/10.1051/0004-6361/201118329