@article{Omar/Wisniewski/Nolte2016,
  author={Ayman Omar and Tomasz Wisniewski and Sandra Nolte},
  title={Diversifying away the Risk of War and Cross-Border Political Crisis},
  journal = {Energy Economics},
  volume = {64},
  pages = {494–510},
  doi = {DOI 10.1016/j.eneco.2016.02.015}
  }