"Artificial Intelligence and the Future of Humans and Robots in the Economy". Council on Foreign Relations Malcolm and Carolyn Wiener Annual Lecture on Science and Technology, www.cfr.org. February 27, 2015.
Washington Irving (2015). “The Complete Works of Washington Irving: Short Stories, Plays, Historical Works, Poetry and Autobiographical Writings (Illustrated): The Entire Opus of the Prolific American Writer, Biographer and Historian, Including The Legend of Sleepy Hollow, Rip Van Winkle, The Sketch Book of Geoffrey Crayon, Bracebridge Hall and many more”, p.139, e-artnow