@misc{indiciae8390b1f56c49,
  title = {Operating Reserves and Variable Generation},
  author = {Ela, E and Milligan, M and Kirby, B},
  year = {2011},
  doi = {10.2172/1023095},
  url = {https://www.osti.gov/biblio/1023095},
  note = {Source identifier: 1023095}
}