@misc{indiciae41be21a93834,
  title = {Variance reduction and cluster decomposition},
  author = {Liu, Keh-Fei and Liang, Jian and Yang, Yi-Bo},
  year = {2018},
  doi = {10.1103/physrevd.97.034507},
  url = {https://www.osti.gov/biblio/1421301},
  note = {Source identifier: 1421301}
}