@misc{indiciae38382830f381,
  title = {hi\_class background evolution, initial conditions and approximation schemes},
  author = {Bellini, Emilio and Sawicki, Ignacy and Zumalacárregui, Miguel},
  year = {2020},
  doi = {10.1088/1475-7516/2020/02/008},
  url = {https://www.osti.gov/biblio/1603623},
  note = {Source identifier: 1603623}
}