Trigonometric parallaxes of massive star forming regions: G012.88+0.48 and W33

Authors: 
Immer, K.; Reid, M. J.; Menten, K. M.; Brunthaler, A.; Dame, T. M.
Year: 
2 013
arXiv: 
http://arxiv.org/abs/1304.2041
Sub project: 
A
Journal Reference: 
A&A 553, 117