"Henry Cavill, Amy Adams, Michael Shannon and Russell Crowe Talk MAN OF STEEL, Making Lois Lane More Active, Getting the Flying Right and Fight Sequences" by Christina Radish, collider.com. June 9, 2013.
John Ruskin, Louisa Caroline Tuthill (1872). “The True and the Beautiful in Nature, Art, Morals, and Religion, Selected from the Works of John Ruskin”, p.242