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Astrophysics and Space Science > 2004 > 292 > 1-4 > 509-515
Astrophysics and Space Science > 2003 > 287 > 1-4 > 161-164
Astrophysics and Space Science > 2004 > 292 > 1-4 > 509-515
Astrophysics and Space Science > 2003 > 287 > 1-4 > 161-164