@article{SD_1960-1961__14_1_A9_0,
     author = {Lefebvre, Pierre},
     title = {Sur certaines \'equivalences simplifiables d'un demi-groupe},
     journal = {S\'eminaire Dubreil. Alg\`ebre et th\'eorie des nombres},
     note = {talk:10},
     pages = {1--18},
     publisher = {Secr\'etariat math\'ematique},
     volume = {14},
     number = {1},
     year = {1960-1961},
     zbl = {0146.25305},
     language = {fr},
     url = {http://archive.numdam.org/item/SD_1960-1961__14_1_A9_0/}
}