A Helium White Dwarf of Extremely Low Mass (页面存档备份,存于互联网档案馆), James Liebert, P. Bergeron, Daniel Eisenstein, H.C. Harris, S.J. Kleinman, Atsuko Nitta, and Jurek Krzesinski, The Astrophysical Journal606, #2(May 2004), pp. L147–L149. Accessed on line 2007-03-05.
A Helium White Dwarf of Extremely Low Mass (页面存档备份,存于互联网档案馆), James Liebert, P. Bergeron, Daniel Eisenstein, H.C. Harris, S.J. Kleinman, Atsuko Nitta, and Jurek Krzesinski, The Astrophysical Journal606, #2(May 2004), pp. L147–L149. Accessed on line 2007-03-05.