This bibliographic database provides citation counts for each reference. Users can analyse citations for individuals or groups as well as calculate h-index, average citation rates and other metrics.

Web of Science (WoS) provides the Journal Citation Reports which can determine a journal's impact through citation analysis.

WoS is selective, with some 10,000+ high impact journals covered (In July 2010 there were 6,650 fully indexed in  science, 1,950 social science, 1,160 arts and humanities). Open Access journals, conference proceedings and monographs are quite poorly covered in WoS; there are, however, 120,000 conference proceedings included. There is a strong English language and US bias.

WoS is available through the UCD Library subscription.

Detailed information on WoS can be found on the Measuring Your Research Impact (MyRI) toolkit.

This database provides citation counts for each reference. Users can analyse citations for individuals or groups as well as calculate h-index, average citation rates and other metrics.

Scopus covers 19,500 journal titles (September 2012), 33% of its titles in Health Sciences, 30% in Physical Sciences, 21% in Social Sciences and 16% in Life Sciences. It also includes 340 book series and 4.9 million conference proceedings.

Scopus is available through the UCD Library subscription.

Detailed information on Scopus can be found on the Measuring Your Research Impact (MyRI) toolkit.

Publish or Perish (PoP) is a freely available software package that searches Google Scholar for academic publications. Google Scholar includes material from repositories, books and conference papers and therefore covers a wide diversity of disciplines.

PoP provides citation counts, calculates h-index, average citation rates and other metrics.

PoP can be downloaded for free.

Detailed information on PoP can be found on the Measuring Your Research Impact (MyRI) toolkit.

Google Scholar added the feature My Citations (GSC) in 2011. Researchers can create a profile (with a free Google account) and add their publications. Publications that are not found in Google Scholar can be added manually. A GSC account will be found when performing an author search in Google Scholar thereby increasing the visibility of a researcher’s publications.

GSC provides citation counts, calculates h-index, average citation rates and other metrics.

Detailed information on GSC can be found at Google Scholar and on the Measuring Your Research Impact (MyRI) toolkit.

Journal Citation Reports (JCR) rank top impact journals in particular subjects or sub-categories of subjects.

A range of metrics are provided including total cites to the journal in the current year, 3 and 5 year Journal Impact Factor (is the most widely used single figure metric to rate journals based on citation data), immediacy index and cited half-life.

Users can also search for a particular journal. This will bring up the above analysis - but also a considerable amount of additional information for the title.

JCR is based on ISI's Web of Knowledge data set. A new version is published each year, coming out 6-7 months after the end of each year.

The 2011 edition has over 8,000 titles in the science and technology disciplines and over 2,600 titles in the social sciences.

JCR is available through the UCD Library subscription.

Detailed information on JCR can be found on the Measuring Your Research Impact (MyRI) toolkit.