@article{Budt2016compressed,
  author = {Budt and Wolf and Span and others},
  title = {A review on compressed air energy storage: Basic principles, past milestones and recent developments},
  journal = {Applied Energy},
  year = {2016},
  doi = {10.1016/j.apenergy.2016.02.108},
  url = {https://doi.org/10.1016/j.apenergy.2016.02.108}
}

@article{Luo2015comparing,
  author = {Luo and Wang and Dooner and others},
  title = {Overview of current development in electrical energy storage technologies and the application potential in power system operation},
  journal = {Applied Energy},
  year = {2015},
  doi = {10.1016/j.apenergy.2014.09.081},
  url = {https://doi.org/10.1016/j.apenergy.2014.09.081}
}