### BibTeX entry

@article{Demaine2010,
title = {Circle Packing for Origami Design Is Hard},
author = {Demaine, E.D. and Fekete, S.P. and Lang, R.J.},
url = {http://arxiv.org/abs/1008.1224 http://arxiv.org/pdf/1008.1224v2},
abstract = {We show that deciding whether a given set of circles can be packed into a rectangle, an equilateral triangle, or a unit square are NP-hard problems, settling the complexity of these natural packing problems. On the positive side, we show that any set of circles of total area 1 can be packed into a square of size 8/pi=2.546... These results are motivated by problems arising in the context of origami design.},
journal = {Arxiv preprint arXiv:1008.1224},
pages = {1--17},
publisher = {arxiv.org},
year = 2010,
urldate = {2010-08-13},
archivePrefix = {arXiv},
eprint = {1008.1224}
}