(en) Jay Holberg, M.A. Barstow et Elizabeth M. Green, « The Discovery of Mg II λ4481 in the White Dwarf EG 102: Evidence for Ongoing Accretion », The Astrophysical Journal, vol. 474, no 2, , L127–L130 (DOI10.1086/310446, Bibcode1997ApJ...474L.127H)
(en) Jay Holberg, M.A. Barstow et Elizabeth M. Green, « The Discovery of Mg II λ4481 in the White Dwarf EG 102: Evidence for Ongoing Accretion », The Astrophysical Journal, vol. 474, no 2, , L127–L130 (DOI10.1086/310446, Bibcode1997ApJ...474L.127H)