@article{Castro:2021YC,
  author = "Castro, Andrea",
  title = "{Measurements of ${\rm t\bar t+jets}$, ${\rm t\bar t}+{\rm b\bar b}$, and ${\rm t\bar t}{\rm t\bar t}$ production at CMS}",
  doi = "10.22323/1.390.0320",
  journal = "PoS",
  year = 2021,
  volume = "ICHEP2020",
  pages = "320"
}