World Data Center for Satellite Information. SPACEWARN Bulletin, No. 640. National Space Science Data Center. 2007-03-01 [2009-12-02]. (原始内容存档于2021-03-21).
World Data Center for Satellite Information. SPACEWARN Bulletin, No. 640. National Space Science Data Center. 2007-03-01 [2009-12-02]. (原始内容存档于2021-03-21).