1. Lecture Notes in Computer Science;E. Biham,1999
2. Lecture Notes in Computer Science;A. Biryukov,2002
3. Lecture Notes in Computer Science;J. Borst,1997
4. Daemen, J., Govaerts, R., Vandewalle, J.: Cryptanalysis of 2.5 round of IDEA (extended abstract), Technical Report ESAC-COSIC Technical Report 93/1, Department Of Electrical Engineering, Katholieke Universiteit Leuven (March 1993)
5. Lecture Notes in Computer Science;J. Daemen,1994