Burton S. Kaliski Jr., Ronald L. Rivest, Alan T. Sherman. Is DES a Pure Cipher? (Results of More Cycling Experiments on DES). In Hugh C. Williams, editor, Advances in Cryptology - CRYPTO 85, Santa Barbara, California, USA, August 18-22, 1985, Proceedings. Volume 218 of Lecture Notes in Computer Science, pages 212-226, Springer, 1985.
Abstract is missing.