@article{SD_1961-1962__15_2_A6_0,
     author = {Preston, Gordon B.},
     title = {Les congruences dans les demi-groupes ab\'eliens et libres},
     journal = {S\'eminaire Dubreil. Alg\`ebre et th\'eorie des nombres},
     note = {talk:17},
     pages = {1--6},
     publisher = {Secr\'etariat math\'ematique},
     volume = {15},
     number = {2},
     year = {1961-1962},
     zbl = {0125.28507},
     language = {fr},
     url = {http://www.numdam.org/item/SD_1961-1962__15_2_A6_0/}
}