T. S. M. F. Physik
发表
National Radio Astronomy Observatory,
F. Davies,
M. Raue,
2009,
0907.1465.
Institute for Astronomy,
Spitzer Science Center,
D. Thompson,
2009,
0904.0448.
H Germany,
E. Lorenz,
M. Kestel,
1999,
astro-ph/9907205.