TY  - JOUR
AU  - O. Bottema
TI  - A Theorem of Bobillier on the Tetrahedron.
JO  - Elemente der Mathematik
PY  - 1969
SP  - 6
EP  - 10
VL  - 24
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ELMA_1969__24_140910/
ID  - ELMA_1969__24_140910
ER  -