@article{incorporatingknowledgeintostructural,
  title = {Incorporating Knowledge into Structural Equation Models using Auxiliary Variables},
  author = {Bryant Chen and Judea Pearl and Elias Bareinboim},
  year = {2015},
  eprint = {1511.02995},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1511.02995v3},
}