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Astrophysics and Space Science > 2006 > 302 > 1-4 > 61-65
General Relativity and Gravitation > 2004 > 36 > 5 > 1197-1206
Astrophysics and Space Science > 2006 > 302 > 1-4 > 61-65
General Relativity and Gravitation > 2004 > 36 > 5 > 1197-1206