PG 1657+416: a new fast pulsating sdB star - Photometric observations and theoretical model comparisonR. Oreiro, F. Pérez Hernández, R. Østensen, J. E. Solheim, J. MacDonald and A. UllaA&A, 461 2 (2007) 585-591DOI: https://doi.org/10.1051/0004-6361:20065119
