[1] UNIV WASHINGTON,DEPT COMP SCI & ENGN,SEATTLE,WA 98195
[2] UNIV GESAMTHSCH PADERBORN,W-4790 PADERBORN,GERMANY
[3] GMDS SYST DESIGN TECHNOL DEPT,PADERBORN,GERMANY
[4] UNIV CALIF BERKELEY,DEPT ELECT ENGN & COMP SCI,BERKELEY,CA 94720
[5] PRINCETON UNIV,PRINCETON,NJ 08544