@article{02221795,
title = {Packing and covering a unit equilateral triangle with equilateral triangles.},
journal = {The Electronic Journal of Combinatorics [electronic only]},
volume = {12},
year = {2005},
zbl = {1083.52005},
language = {en},
url = {http://dml.mathdoc.fr/item/02221795}
}
Zhang, Yuqin; Fan, Yonghui. Packing and covering a unit equilateral triangle with equilateral triangles.. The Electronic Journal of Combinatorics [electronic only], Tome 12 (2005) . http://gdmltest.u-ga.fr/item/02221795/