The LBV nature of Romano's star (GR 290) in M 33 V. F. Polcaro, R. Gualandi, L. Norci, C. Rossi and R. F. Viotti A&A, 411 2 (2003) 193-196 Published online: 17 November 2003 DOI: 10.1051/0004-6361:20031149