Michel de Montaigne (1850). “Works, Comprising His Essays, Letters, and Journey Through Germany and Italy: With Notes from All the Commentators, Biographical and Bibliographical Notices &c., &c”, p.94
"The theory of the firm in the last ten Years" by Kenneth E. Boulding in "The American Economic Review", Volume 32, No. 4 (pp. 791-802), December 1942.
"Harrison Ford, Liam Hemsworth, Amber Heard, Lucas Till, and Director Robert Luketic Talk PARANOIA, Real-Life Parallels, and More". Interview with Sheila Roberts, collider.com. August 12, 2013.