Two new ZZ Ceti pulsators from the HS and HE surveys R. Silvotti, B. Voss, I. Bruni, D. Koester, D. Reimers, R. Napiwotzki and D. Homeier A&A, 443 1 (2005) 195-199 Published online: 21 October 2005 DOI: 10.1051/0004-6361:20053362