Impact Factor
3.18
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.
Place of publication varies.
Also issued online.
Texts in English, German, or French, with summaries in the three languages.
Vol. 31, no. 4 (1991)19910304 Notice published Printed on acid-free paper that meets the full ANSI standard for Permanent Paper