LNCS, Advances in Cryptology - Crypto'87, page. 418 - 426, 1988-08-01
LNCS, Advances in Cryptology - Eurocrypt'88, page. 275 - 280, 1988-08-01
Proc. of IEEE Int'l Symp. Circuit & Systems, page. 361 - 364, 1988-06-01