Spectral types and masses of white dwarfs in globular clustersS. Moehler, D. Koester, M. Zoccali, F. R. Ferraro, U. Heber, R. Napiwotzki and A. RenziniA&A, 420 2 (2004) 515-525DOI: https://doi.org/10.1051/0004-6361:20035819
