Spain Univ. of La Laguna
发表
UK.,
D. Steeghs,
P. Hakala,
2000,
astro-ph/0011296.
A. J. Castro-Tirado,
France,
A. de Ugarte Postigo,
2008,
0810.4333.
Finland.,
P. Rodríguez-Gil,
J. Casares,
2001,
astro-ph/0110173.