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General Relativity and Gravitation > 2019 > 51 > 9 > 1-6
Advances in Space Research > 2015 > 55 > 1 > 501-524
Advances in Space Research > 2011 > 48 > 7 > 1248-1257
Space Science Reviews > 2009 > 148 > 1-4 > 15-23
Experimental Astronomy > 2009 > 23 > 2 > 611-649
Advances in Space Research > 2007 > 39 > 2 > 259-267