Research index·Book chapterCHAPTER28 Oct 2013DOI10.4324/9780203040720-68Book chapterCHAPTER2013 · SubscriptionDOI10.4324/9780203040720-68ReadRead 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 discussionTopicsComputer scienceRelated papersMoreDetailsPublished, issue, languageSuggest a correction or report