TY - CONF T1 - Estimating the low-mass IMF in OB associations: sigma orionis JO - Initial Mass Function 50 years Later PY - 2005/01/01 AU - Burningham B AU - Naylor T AU - Littlefair SP AU - Jeffries RD ED - Corbelli E ED - Palla F ED - Zinnecker H VL - 327 SP - 141 EP - 142 Y2 - 2024/12/23 ER -