@article{JTNB_2000__12_1_209_0,
     author = {de Smit, Bart},
     title = {The cyclic subfield integer index},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {209--218},
     publisher = {Universit\'e Bordeaux I},
     volume = {12},
     number = {1},
     year = {2000},
     mrnumber = {1827848},
     zbl = {1008.11040},
     language = {en},
     url = {http://www.numdam.org/item/JTNB_2000__12_1_209_0/}
}