Discovery of two M 32 twins in Abell 1689S. Mieske, L. Infante, M. Hilker, G. Hertling, J. P. Blakeslee, N. Benítez, H. Ford and K. ZekserA&A, 430 2 (2005) L25-L28DOI: https://doi.org/10.1051/0004-6361:200400119