@article{CLTM_1965_1965_1_a0,
     author = {Calais, Josette},
     title = {Equivalences principales g\'en\'eralis\'ees dans les demigroupes.},
     journal = {Collectanea mathematica},
     pages = {3-73},
     year = {1965},
     number = {1},
     zbl = {0133.27603},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1965_1965_1_a0/}
}