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Publication and Citation Analysis

publishers (including 2600 open access journals). This database also
contains conference reports (5.5 million conference articles), 350 book
series and quality-selected web sources. Scopus’ content expanded consid-
erably since June 2009. It also covers a large number of journals from the
Arts & Humanities.
Scopus contains about 50 million records, among which:
• 29 million referring to articles published since 1996
• 21 million older records
Scopus contains historical material from the American Chemical
Society, Springer / Kluwer, the Institute of Physics (IOP), the American
Physical Society, the American Institute of Physics, the Royal Society of
Chemistry and the journals Nature (going back to 1869) and Science
(going back to 1880).
Finally Scopus contains articles ‘in press’ from 3850 journals. These
journals are published by Cambridge University Press, Elsevier, Springer
Nature, Karger Medical and Scientific Publishers and the IEEE. It has
100% coverage of all Medline titles.
In Scopus it is possible to see the percentage of uncited articles of a
journal.

5.17 GOOGLE SCHOLAR (GS)

Informetric data from GS can be consulted via Publish or Perish. This pro-
gram was developed by Anne-Wil Harzing and can be found at: http://
www.harzing.com/pop.htm. It is described and its use illustrated in
Harzing (2010). Publish or Perish is a software program that can easily
and freely be installed on one’s computer. It finds and analyses citations
using GS as source. The following indicators are calculated for a given set
of articles:
• The total number of publications.
• The total number of received citations.
• The average number of citations per publication.
• The average number of citations per author.
• The average number of articles per author.
• The average number of citations per year.
• The h-index and some variants.
• The g-index.
• The number of authors per article.