Identification of 13 DB + dM and 2 DC + dM binaries from the Sloan Digital Sky SurveyE. J. M. van den Besselaar, G. H. A. Roelofs, G. A. Nelemans, T. Augusteijn and P. J. GrootA&A, 434 3 (2005) L13-L16DOI: https://doi.org/10.1051/0004-6361:200500102
