The 2006 hot phase of Romano's star (GR 290) in M 33R. F. Viotti, S. Galleti, R. Gualandi, F. Montagni, V. F. Polcaro, C. Rossi and L. NorciA&A, 464 3 (2007) L53-L55DOI: https://doi.org/10.1051/0004-6361:20067001