TY  - JOUR
AU  - H. Katsuura 
TI  - Dihedral Angles of 4-Ball Tetrahedra
JO  - Journal for geometry and graphics
PY  - 2021
SP  - 197
EP  - 204
VL  - 25
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/JGG_2021_25_2_JGG_2021_25_2_a3/
ID  - JGG_2021_25_2_JGG_2021_25_2_a3
ER  -