@article{SDPP_1971-1972__13_2_A7_0,
     author = {Gras, Georges},
     title = {\'Etude du $\ell $-groupe des classes des extensions cycliques de degr\'e $\ell $},
     journal = {S\'eminaire Delange-Pisot-Poitou. Th\'eorie des nombres},
     note = {talk:20},
     pages = {1--12},
     publisher = {Secr\'etariat math\'ematique},
     volume = {13},
     number = {2},
     year = {1971-1972},
     mrnumber = {392923},
     zbl = {0322.12012},
     language = {fr},
     url = {http://www.numdam.org/item/SDPP_1971-1972__13_2_A7_0/}
}