Impact Factor
3.52
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.
Title from cover.
Print issues ceased with v. 25, no. 6 (2012).
Also issued online.
v. 12, no. 1 (Feb. 1999)20010423 Notice published Printed on acid-free paper