Ground-based CCD astrometry with wide field imagers - I. Observations just a few years apart allow decontamination of field objects from members in two globular clustersJ. Anderson, L. R. Bedin, G. Piotto, R. S. Yadav and A. BelliniA&A, 454 3 (2006) 1029-1045DOI: https://doi.org/10.1051/0004-6361:20065004
