Binaries discovered by the SPY project - IV. Five single-lined DA double white dwarfs G. Nelemans, R. Napiwotzki, C. Karl, T. R. Marsh, B. Voss, G. Roelofs, R. G. Izzard, M. Montgomery, T. Reerink, N. Christlieb and D. Reimers A&A, 440 3 (2005) 1087-1095 Published online: 05 September 2005 DOI: 10.1051/0004-6361:20053174