GD 424 - A helium-atmosphere white dwarf with a large amount of trace hydrogen in the process of digesting a rocky planetesimal

1. Izquierdo, P.
2. Toloza, O.
3. Gänsicke, B.T.
4. Rodríguez-Gil, P.
5. Farihi, J.
6. Koester, D.
7. Guo, J.
8. Redfield, S.