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article Free Access Share on Office Information Systems and Computer Science Authors: Clarence A. Ellis Xerox, Palo Alto Research Center, 3333 Coyote Hill Road, Palo Alto, California Xerox, Palo Alto Research Center, 3333 Coyote Hill Road, Palo Alto, CaliforniaView Profile , Gary J. Nutt Xerox, Palo Alto Research Center, 3333 Coyote Hill Road, Palo Alto, California Xerox, Palo Alto Research Center, 3333 Coyote Hill Road, Palo Alto, CaliforniaView Profile Authors Info & Claims ACM Computing SurveysVolume 12Issue 1March 1980 pp 27–60https://doi.org/10.1145/356802.356805Published:01 March 1980Publication History 230citation2,923DownloadsMetricsTotal Citations230Total Downloads2,923Last 12 Months270Last 6 weeks55 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my Alerts New Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF
Ellis et al. (Sat,) studied this question.