MITCHELL, W. J. T. Picture theory : essays on verbal and visual representation. pbk. ed. Chicago : University of Chicago Press, 1995. xv, 445 s. Available on Internet: <http://www.dandelon.com/servlet/download/attachments/dandelon/ids/DE00610DECC6C772DBFF2C1257A3600451075.pdf> ISBN 0-226-53232-1.