King, D.A. (2004). 'The scientific impact of nations. What different countries get for their research spending', Nature, 430, 311-316.
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King, David A. (2004), »The scientific impact of nations. What different countries get for their research spending«, Nature, 430, S. 311-316.
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King, D. A. (2004). 'The scientific impact of nations. What different countries get for their research spending'. Nature, 430 pp. 311-316.
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