VizieR Online Data Catalog: NGC 55 blue massive stars VLT-spectroscopy (Castro+, 2008)
Journal article published in 2008 by
N. Castro 
,
A. Herrero,
M. Garcia,
C. Trundle,
F. Bresolin,
W. Gieren,
G. Pietrzynski,
R.-P. Kudritzki,
R. Demarco
,
A. Herrero,
M. Garcia,
C. Trundle,
F. Bresolin,
W. Gieren,
G. Pietrzynski,
R.-P. Kudritzki,
R. Demarco
