@article{ASCFM_1977__65_15_12_0,
     author = {Baldi, Paolo},
     title = {Sur la classification des groupes r\'ecurrents},
     journal = {Annales scientifiques de l'Universit\'e de Clermont. Math\'ematiques},
     pages = {12--18},
     publisher = {UER de Sciences exactes et naturelles de l'Universit\'e de Clermont},
     volume = {65},
     number = {15},
     year = {1977},
     mrnumber = {494504},
     zbl = {0382.60074},
     language = {fr},
     url = {http://www.numdam.org/item/ASCFM_1977__65_15_12_0/}
}