Models of low-mass helium white dwarfs including gravitational settling, thermal and chemical diffusion, and rotational mixingA. G. Istrate, P. Marchant, T. M. Tauris, N. Langer, R. J. Stancliffe and L. GrassitelliA&A, 595 (2016) A35DOI: https://doi.org/10.1051/0004-6361/201628874