Kudryavtseva, N., W. Brandner, M. Gennaro, B. Rochau, A. Stolte, M. Andersen, N. Da Rio, T. Henning, E. Tognelli, D. Hogg, S. Clark and R. Waters: Instantaneous starburst of the massive clusters Westerlund 1 and NGC 3603 YC. 750, 2, (2012).
url: http://cdsads.u-strasbg.fr/abs/2012ApJ...750L..44K
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