Grundmann, Siegfried, SpringerLink (Online service)
Springer-Verlag Berlin Heidelberg
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Schroeder, Prosper, SpringerLink (Online service)
Springer-Verlag France
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Suisky, Dieter, SpringerLink (Online service)
Springer Berlin Heidelberg
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Petkov, Vesselin, SpringerLink (Online service)
Springer
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Schopper, Herwig, SpringerLink (Online service)
Springer-Verlag Berlin Heidelberg
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Buonanno, Roberto, SpringerLink (Online service)
Springer-Verlag Italia, Milano
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Sidharth, B. G., SpringerLink (Online service)
Springer Science + Business Media B.V
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Plotnitsky, Arkady, SpringerLink (Online service)
Springer
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Kox, A. J., Eisenstaedt, Jean, SpringerLink (Online service)
The Center for Einstein Studies
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Topper, David R., SpringerLink (Online service)
Springer Science+Business Media, LLC
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Home, Dipankar, Whitaker, Andrew, SpringerLink (Online service)
Springer Science+Business Media, LLC
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Buchwald, Jed Z., Franklin, Allan, SpringerLink (Online service)
Springer
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