Balloon 090100001: A short and long period pulsating sdB star R. Oreiro, F. Pérez Hernández, A. Ulla, R. Garrido, R. Østensen and J. MacDonald A&A, 438 1 (2005) 257-263 Published online: 06 July 2005 DOI: 10.1051/0004-6361:20052681