Notre Dame
发表
Andrew Gould,
David P. Bennett,
CEA Saclay,
2005,
astro-ph/0506183.
Brian McLeod,
David Bersier,
STScI,
2004,
astro-ph/0405062.
Princeton,
University of Hawaii,
M. Modjaz,
2007
.
P. Moller,
M. I. Andersen,
Copenhagen,
2001,
astro-ph/0103058.