What is a Citator?
- A citator is a research tool that allows one to look up a specific citation (to a case, a statute, etc.) to discover other resources that cite it. This is used, for example, to verify the validity of a case (is it still good law? --- or, has it been subsequently overturned, or reversed on appeal?) or to find additional cases or other materials on the same topic.
- While some citators are available in paper format, the online versions are more up-to-date and more efficient to use.
Using a Citator to check a CASE
--determine the validity of a case (has it been reversed on appeal? been overruled? been treated negatively by a subsequent court?)
--discover the history of a case (prior and subsequent)
--find parallel citations
--locate other cases that have cited your case (and are likely to deal with a similar issue)
--locate secondary sources that have cited your case & address your topic
Using a Citator to check a Statute
You can -
--discover the history of a statute (Has it been amended? Reversed? Is there pending legislation?)
--locate cases that have cited the statute
--learn how citing cases have interpreted the statute
--discover secondary sources that cite the statute & address your topic
List of Legal Citators
Shepard's Citations (via LexisNexis)
- Shepard's Citations via Lexis.com (law school password required)
See Shepard's Product Guide
- Shepard's Citations via Lexis Advance (law school password required)
Start your Shepard's request with shep:
- Shepard's Citations via LexisNexis Academic (available to all at UB)
Click on "US Legal" in the left frame; then click on "Shepard's Citations".
NOTE:only CASES can be shepardized on this platform
KeyCite (via Westlaw )
- KeyCite via Westlaw (law school password required)
- KeyCite via WestlawNext (law school password required)
Type kc or keycite followed by a citation, e.g., kc 93 sct 1817 or keycite 93 sct 1817, in the text box at the top of the page and click Search.
Other Citators (not necessarily legal)
Social Science Citation Index (for articles, including law review articles)