@article{PMB_1989___1_A1_0,
     author = {Stevenhagen, Peter},
     title = {Ray class groups and governing fields},
     journal = {Publications math\'ematiques de la Facult\'e des sciences de Besan\c{c}on. Th\'eorie des nombres},
     eid = {1},
     pages = {1--93},
     publisher = {Universit\'e de Besan\c{c}on},
     number = {1},
     year = {1989},
     doi = {10.5802/pmb.a-56},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/pmb.a-56/}
}