The single publication H-index of papers in the Hirsch-core of a researcher and the indirect H-index

  • Authors:

  • L. Egghe

  • Affiliations:

  • Universiteit Hasselt (UHasselt), Campus Diepenbeek, Diepenbeek, Belgium 3590 and Universiteit Antwerpen (UA), IBW, Stadscampus, Antwerpen, Belgium 2000

  • Venue:
  • Scientometrics
  • Year:
  • 2011

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Abstract

The single publication H-index of Schubert is applied to the papers in the Hirsch-core of a researcher, journal or topic. Four practical examples are given and regularities are explained: the regression line of the single publication H-index of the ranked papers in the Hirsch-core is decreasing. We propose two measures of indirect citation impact: the average of the single publication H-indices of the papers in the Hirsch-core and the H-index of these single publication H-indices, defined as the indirect H-index. Formulae for these indirect citation impact measures are given in the Lotkaian context.