TY - JOUR AU - Sah, Chih-Han TI - Scissors congruences, I. The Gauss-Bonnet map. JO - Mathematica Scandinavica PY - 1981 VL - 49 SP - 181 EP - 210 KW - polytope group; scissors congruence; Gauss-Bonnet map; Dehn invariants; divisibility results UR - http://eudml.org/doc/166768 ER -