Berger, Helmut, SpringerLink (Online service)
Springer Science+Business Media B.V.
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Breithaupt, Thomas, Thiel, Martin, SpringerLink (Online service)
Springer Science+Business Media, LLC
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Karaca, Ayten, SpringerLink (Online service)
Springer-Verlag Berlin Heidelberg
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Sabelis, Maurice W., Bruin, Jan, SpringerLink (Online service)
Springer Science+Business Media B.V.
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Stansly, Philip A., Naranjo, Steven E., SpringerLink (Online service)
Springer Science+Business Media B.V.
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Blum, Udo, SpringerLink (Online service)
Springer Science+Business Media B.V.
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Heckman, Charles W., SpringerLink (Online service)
Springer Science+Business Media B.V.
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Witzany, Günther, SpringerLink (Online service)
Springer-Verlag Berlin Heidelberg
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Hepburn, H. Randall, Radloff, Sarah E., SpringerLink (Online service)
Springer-Verlag Berlin Heidelberg
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Arai, Ryoichi, SpringerLink (Online service)
Springer
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European Space Policy Institute, Vienna, Austria, Zboray, Géza, Molnár, Kinga, Pálfia, Zsolt, Kovács, Zsolt, Kriska, …
Springer-Verlag Vienna
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Thompson, Charles F., SpringerLink (Online service)
Springer Science+Business Media, LLC
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