TY  - JOUR
AU  - Schaer, J.
TI  - The Densest Packing of 9 Circles in a Square
JO  - Canadian mathematical bulletin
PY  - 1965
SP  - 273
EP  - 277
VL  - 8
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1965-018-9/
DO  - 10.4153/CMB-1965-018-9
ID  - 10_4153_CMB_1965_018_9
ER  -