Journal Citation Reports: JCR (ISI) is now called InCites Evaluate journals using citation data drawn from over 7,500 scholarly and technical journals. It is the only source of citation data on journals, and includes virtually all areas of science, technology, and social sciences. Journal Citation Reports can show you the:
Web of Science (ISI) Citations and abstracts from scholarly literature in the sciences, social sciences, arts, and humanities. Includes over 8,500 high impact research journals, conference proceedings, symposia, seminars, colloquia, workshops, and conventions also included. Cited reference searching allows you to track prior research, see who is citing your work, measure the influence of someone's work, and navigate forward, backward and through the literature of your discipline. Coverage 1975-present. How to do Cited Reference Searching (video)
What is the h-index?
H-index stands for Hirsch index. It is a measure of an individual's scientific research output.
It was originally proposed by J.E. Hirsch.
If your h-index is 5, it means that you have 5 articles that have been cited at least 5 times.
However, one should also cite the source from which the h-index was derived, as in: "My h-index is 12, calculated on December 5, 2015, using Web of Science data from 1975-2015."
Hirsch believed the h-index was a better measure than one's "average citation rate." Hirsch used Web of Science as the tool for his calculations.
See: Hirsch, J. E. (2005). An Index to Quantify an Individual's Scientific Research Output. Proceedings Of The National Academy Of Sciences Of The United States Of America, 102(46), 16569-16572.