TY  - JOUR
AU  - M. Ternullo 
TI  - Common Tangents to Ellipse and Circles, the 13-Point Circle and Other Theorems
JO  - Journal for geometry and graphics
PY  - 2019
SP  - 45
EP  - 63
VL  - 23
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/JGG_2019_23_1_JGG_2019_23_1_a5/
ID  - JGG_2019_23_1_JGG_2019_23_1_a5
ER  -