Grothendieck, A. (1966). Introduction au Langage Fonctoriel. https://agrothendieck.github.io/divers/ilfg.pdf 
@misc{grothendieck:1966:ilf,
  title = {Introduction au Langage Fonctoriel},
  author = {Grothendieck, A.},
  year = {1966},
  url = {https://agrothendieck.github.io/divers/ilfg.pdf},
  note = {Notes taken by M. Karoubi from a course by A. Grothendieck; transcribed by Mateo Carmona.}
}