Time-resolved optical spectroscopy of the pulsating DA white dwarf HS 0507+0434B - New constraints on mode identification and pulsation propertiesR. Kotak, M. H. van Kerkwijk and J. C. ClemensA&A, 388 1 (2002) 219-234DOI: https://doi.org/10.1051/0004-6361:20020474