Charles Petzold: XCOPY—The DOS 3.2 Treasure. In: PC Magazine. Band6, Nr.5. Ziff Davis, 10. März 1987, S.339 (englisch, eingeschränkte Vorschau in der Google-Buchsuche): “Sometimes a new DOS version isn't much of an improvement over the previous one. At other times, however, the new DOS version contains a real gem. The XCOPY command in DOS 3.2 is one of these gems. XCOPY is an extended COPY command that includes some of the features of BACKUP, as well.”
Robert D. Ainsbury: DOS 6 Secrets. IDG Books, 1993, ISBN 1-878058-70-3, Kicking the COPY Habit, S.47 (englisch, eingeschränkte Vorschau in der Google-Buchsuche): “Blue Bashers might be interested in knowing that IBM, not Microsoft, programmed XCOPY …”
Charles Petzold: XCOPY—The DOS 3.2 Treasure. In: PC Magazine. Band6, Nr.5. Ziff Davis, 10. März 1987, S.339 (englisch, eingeschränkte Vorschau in der Google-Buchsuche): “First, XCOPY is fast. XCOPY reads from the source disk as many files as will fit into memory, and only then writes the files out to the destination disk. COPY, on the other hand, reads and writes each file individually, continually switching back and forth between the drives.”
Robert D. Ainsbury: DOS 6 Secrets. IDG Books, 1993, ISBN 1-878058-70-3, Kicking the COPY Habit, S.47 (englisch, eingeschränkte Vorschau in der Google-Buchsuche): “XCOPY is much better than COPY. … It's smarter and faster than COPY.”