Multiwavelength observations of a giant flare on CN Leonis - I. The chromosphere as seen in the optical spectraB. Fuhrmeister, C. Liefke, J. H. M. M. Schmitt and A. ReinersA&A, 487 1 (2008) 293-306DOI: https://doi.org/10.1051/0004-6361:200809379
