@inproceedings{DeHiKr2010,
Title = {Optimal Homologous Cycles, Total Unimodularity, and
Linear Programming},
Author = {Tamal K. Dey and Anil N. Hirani and Bala Krishnamoorthy},
Booktitle = {STOC '10: Proceedings of the 42nd ACM symposium on Theory of computing},
Doi = {10.1145/1806689.1806721},
Pages = {221--230},
Month = {June 6--8},
Year = {2010},
Location = {Cambridge, Massachusetts, USA},
Publisher = {ACM},
Address = {New York, NY, USA},
Url = {http://doi.acm.org/10.1145/1806689.1806721},
Note = {Also available as preprint arXiv:1001.0338v3 [math.AT] on
http://arxiv.org/abs/1001.0338}}