Metrics used for measuring the impact of a document are citation counts, field-weight citation impact, etc. Often, you will find citation counts in the place of "Cited by" or "Time cited" in library databases or other online tools.
Citation analysis tools
There are three key tools you may use to find high impact articles in your research field. You can also use these tools to find who has cited your publications and where. We recommend you use all three tools. Although they may return identical results, there is a good chance that at least one tool will find something the others do not.
Other library databases, such as EBSCO, ProQuest, Emerald, ACM Digital Library, IEEE Xplore, JSTOR, ScienceDirect, SpringerLink and Ovid, also provide citation information. These database can be used as additional tools for finding citations of your articles.