@article{article, title = {{A VLT/FLAMES survey for massive binaries in Westerlund 1 I. First observations of luminous evolved stars}}, url = {{}}, year = {{2009}}, month = {{12}}, author = {{Ritchie BW and Clark JS and Negueruela I and Crowther PA}}, doi = {{10.1051/0004-6361/200912686}}, volume = {{507}}, journal = {{ASTRON ASTROPHYS}}, issue = {{3}}, pages = {{1585-1595}}, note = {{Accessed on 2024/12/23}}}