1. Lect Notes Comput Sci;J. Buchmann,1991
2. Buchmann, J., Hamdy, S.: A survey on IQ cryptography. Technical Report No. TI-4/01, Darmstadt University of Technology, 2001.
3. Lect Notes Comput Sci;J. Buchmann,1997
4. Buchmann, J., Willams, H. C.: A key-exchange system based on imaginary quadratic fields. J. Cryptology 1 (1988) 107–118.
5. Cohen, H.: A course in Computational Algebraic Number Theory, Springer, Berlin, 1995.