@article{GDZPPN00207558X,
title = {Packing of 18 Equal Circles on a Sphere.},
journal = {Elemente der Mathematik},
volume = {20},
year = {1965},
pages = {59-61},
zbl = {0129.37502},
url = {http://dml.mathdoc.fr/item/GDZPPN00207558X}
}
Goldberg, Michael. Packing of 18 Equal Circles on a Sphere.. Elemente der Mathematik, Tome 20 (1965) pp. 59-61. http://gdmltest.u-ga.fr/item/GDZPPN00207558X/