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  • × year_i:[1990 TO 2000}
  1. Schramm, R.: Patentinformation (1997) 9.62 
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    Schramm, R.
  2. Schramm, R.; Bartkowski, A.: Patentindikatoren zur Ermittlung von Kerninformationen (1996) 9.62 
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  3. Schramm, R.: Kerninformationen mittels formaler Bewertungskritierien (1996) 9.62 
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  4. Schramm, R.; Ludwig, J.: Regionales Patentnetz in Thüringen : neue Informationsdienstleistungen (1998) 9.62 
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