(EN) Voce nell'Enciclopedia Britannica: Revelation to John appears to be a collection of separate units composed by unknown authors who lived during the last quarter of the 1st century, though it purports to have been written by an individual named John—who calls himself "the servant" of Jesus—at Patmos, in the Aegean Sea. The text includes no indication that John of Patmos and John the Apostle are the same person.
earlychristianwritings.com
Werner Georg Kummel, Introduction to the New Testament, Abingdon Press, 1996, ISBN 0-687-05576-8, pp. 466-468, citato in: Peter Kirby, "The Apocalypse of John". Early Christian Writings. 2006. 2 Feb. 2006 <The Book of Revelation>.
