Dynamical mass of a star cluster in M 83: a test of fibre-fed multi-object spectroscopyS. L. Moll, R. de Grijs, P. Anders, P. A. Crowther, S. S. Larsen, L. J. Smith and S. F. Portegies ZwartA&A, 490 1 (2008) 125-133DOI: https://doi.org/10.1051/0004-6361:200810163