TY - JOUR T1 - A VLT/FLAMES survey for massive binaries in Westerlund 1: III. the WC9d binary W239 and implications for massive stellar evolution JO - Astronomy and Astrophysics PY - 2011/06/06 AU - Clark JS AU - Ritchie BW AU - Negueruela I AU - Crowther PA AU - Damineli A AU - Jablonski FJ AU - Langer N ED - DO - DOI: 10.1051/0004-6361/201116990 VL - 531 Y2 - 2025/11/06 ER -