Bart Preneel Vincent Rijmen Antoon Bosselaers Recent Developments in the Design of Conventional Cryptographic Algorithms. 105-130 1997 conf/ac/1997crypto State of the Art in Applied Cryptography http://link.springer.de/link/service/series/0558/bibs/1528/15280105.htm db/conf/ac/crypto1997.html#PreneelRB97