TY - JOUR AU - Akira Ushijima TI - Dirichlet polyhedra for simplex groups of spherical, Euclidean or hyperbolic spaces JO - Annales Fennici Mathematici PY - 2021 SP - 123 EP - 127 VL - 46 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AFM_2021_46_1_a6/ LA - en ID - AFM_2021_46_1_a6 ER -