The hot subdwarf B + white dwarf binary KPD 1930+2752 - A supernova type Ia progenitor candidateS. Geier, S. Nesslinger, U. Heber, N. Przybilla, R. Napiwotzki and R.-P. KudritzkiA&A, 464 1 (2007) 299-307DOI: https://doi.org/10.1051/0004-6361:20066098