@article{DIA_1979__1__A4_0,
     author = {Guitart, Ren\'e},
     title = {Th\'eorie des bornes},
     journal = {Diagrammes},
     note = {talk:4},
     pages = {G1--G4},
     publisher = {Universit\'e Paris 7, Unit\'e d'enseignement et de recherche de math\'ematiques},
     volume = {1},
     year = {1979},
     mrnumber = {684433},
     language = {fr},
     url = {http://www.numdam.org/item/DIA_1979__1__A4_0/}
}