@article{amodificationofthehalpernpearl,
  title = {A Modification of the Halpern-Pearl Definition of Causality},
  author = {Joseph Y. Halpern},
  year = {2015},
  eprint = {1505.00162},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1505.00162v1},
}