Impact Factor
4.80
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.
Vol. 39, no. 3 and no. 4 (1990) have overlapping p. 481-506 due to a printing error.
Supplements accompany some vols.
Also issued online.