@article{Keinholz18,
  title = {Matroids},
  author = {Jonas Keinholz},
  year = {2018},
  url = {https://www.isa-afp.org/entries/Matroids.html},
  researchr = {https://researchr.org/publication/Keinholz18},
  cites = {0},
  citedby = {0},
  journal = {Archive of Formal Proofs},
  volume = {2018},
}