VLBI study of maser kinematics in high-mass star-forming regions - II. G23.01–0.41 A. Sanna, L. Moscadelli, R. Cesaroni, A. Tarchi, R. S. Furuya and C. Goddi A&A, 517 (2010) A78 Published online: 11 August 2010 DOI: 10.1051/0004-6361/201014234