Citation impact refers to the number of times a publication is cited by subsequent publications. These raw citation counts can be analyzed according to a number of variables using Web of Science or Scopus. Citation counts are also used in the calculation of the h-index and other indices. Use of citation counts in research metrics assumes that citations are an indication of research impact - that is, that the research being cited has made a contribution to to the research that cites it.
These are the three major tools for obtaining citation counts here at Dalhousie. Though they may provide some of the same functions, they have different strengths in terms of depth of coverage for different disciplines.
These databases can also be a source of citation information.