1. Burnikel, C., Fleischer, R., Mehlhorn, K., Schirra, S.: Exact efficient computational geometry made easy. In: Proceedings of the 15th Annual Symposium on Computational Geometry (SCG’99), pp. 341–350 (1999)
2. Burnikel, C., Fleischer, R., Mehlhorn, K., Schirra, S.: A strong and easily computable separation bound for arithmetic expressions involving radicals. Algorithmica 27, 87–99 (2000)
3. Lecture Notes in Computer Science;C. Burnikel,1994
4. Burnikel, C., Mehlhorn, K., Schirra, S.: The LEDA class real number. Technical report MPI-I-96-1-001, Max-Planck-Institut für Informatik, Saarbrücken (1996)
5. Canny, J.F.: The Complexity of Robot Motion Planning. MIT Press, Cambridge (1987)