Spectral analyses of DO white dwarfs and PG 1159 stars from the Sloan Digital Sky Survey S. D. Hügelmeyer, S. Dreizler, K. Werner, J. Krzesiński, A. Nitta and S. J. Kleinman A&A, 442 1 (2005) 309-314 Published online: 30 September 2005 DOI: 10.1051/0004-6361:20053280