TY  - JOUR
AU  - H. Katsuura 
TI  - In and Ex Spheres of a Tetrahedron
JO  - Journal for geometry and graphics
PY  - 2024
SP  - 19
EP  - 27
VL  - 28
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/JGG_2024_28_1_JGG_2024_28_1_a1/
ID  - JGG_2024_28_1_JGG_2024_28_1_a1
ER  -