@article{DIA_1992__27__A3_0,
     author = {Henry, C.},
     title = {Propri\'et\'es de permanence et existence de r\'ealisations minimales pour les alg\`ebres multisortes},
     journal = {Diagrammes},
     note = {talk:3},
     pages = {CH1--CH53},
     publisher = {Universit\'e Paris 7, Unit\'e d'enseignement et de recherche de math\'ematiques},
     volume = {27},
     year = {1992},
     mrnumber = {1194781},
     zbl = {0778.18004},
     language = {fr},
     url = {http://www.numdam.org/item/DIA_1992__27__A3_0/}
}