@article{digitalcohomologymodulesanddigital,
  title = {Digital (co)homology modules and digital Pontryagin algebras},
  author = {Dae-Woong Lee},
  year = {2011},
  eprint = {1109.3850},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1109.3850v2},
}