@article{02153149,
title = {Optimal substructures in optimal and approximate circle packings.},
journal = {Beitr\"age zur Algebra und Geometrie},
volume = {46},
year = {2005},
pages = {103-118},
zbl = {1076.52004},
language = {en},
url = {http://dml.mathdoc.fr/item/02153149}
}
Szabó, Péter Gábor. Optimal substructures in optimal and approximate circle packings.. Beiträge zur Algebra und Geometrie, Tome 46 (2005) pp. 103-118. http://gdmltest.u-ga.fr/item/02153149/