Mass segregation of different populations inside the cluster NGC 6101 G. Marconi, G. Andreuzzi, L. Pulone, S. Cassisi, V. Testa and R. Buonanno A&A, 380 2 (2001) 478-489 Published online: 15 December 2001 DOI: 10.1051/0004-6361:20011407