Impact Factor
3.27
Estimated influence, citation density, publishing volume, and citation integrity from the analytics table.
Volume, recency, access pattern, and citing-community signals from the journal analytics record.
Recent article records with DOI-first linking and condensed abstracts.
Some issues, with distinctive titles representing only the first article in the issue, are called Special monograph supplements.
Print issues ceased with v. 40 (2012)
Also issued online.