Spectroscopic constraints on the form of the stellar cluster mass functionN. Bastian, I. S. Konstantopoulos, G. Trancho, D. R. Weisz, S. S. Larsen, M. Fouesneau, C. B. Kaschinski and M. GielesA&A, 541 (2012) A25DOI: https://doi.org/10.1051/0004-6361/201219079