White dwarfs with a surface electrical charge distribution: equilibrium and stabilityG. A. Carvalho, José D. V. Arbañil, R. M. Marinho and M. MalheiroEur. Phys. J. C, 78 5 (2018) 411DOI: https://doi.org/10.1140/epjc/s10052-018-5901-2