Research index·Journal articleLettersScience News·22 Mar 2003NobleIDark:/48914/w1/20260521/3BD2EAB9DOI10.2307/4014236Journal articleLettersScience News · 2003 · SubscriptionNobleIDark:/48914/w1/20260521/3BD2EAB9DOI10.2307/4014236ReadRead at the publisherSaveCiteAdd to literature reviewPaywalledThe full text is at the publisherOpen it at the publisher to read it.Read at the publisherDiscussionAdd to the discussionTopicsCitationComputer scienceInformation retrievalLibrary scienceWorld Wide WebRelated papersMoreDetailsPublished, publisher, issueSuggest a correction or report