Your search returned the following 2 documents:

2. A Descartes algorithm for polynomials with bit-stream coefficients
   Arno Eigenwillig, Lutz Kettner, Werner Krandick, Kurt Mehlhorn, Susanne Schmitt, and Nicola Wolpert
   In: Computer Algebra in Scientific Computing : 8th International Workshop, CASC 2005, Kalamata, Greece, 2005, 138-149
   [PDF: Download: AG1_003.pdf] [PDF: Download: Mehlhorn_a_2005_a.pdf]
   
1. The diamond operator - Implementation of exact real algebraic numbers
   Susanne Schmitt
   In: Computer Algebra in Scientific Computing, 8th International Workshop, CASC 2005, Kalamata, Greece, 2005, 355-366
   [PS: Download: ext.ps]