@article{PMB_1981____A6_0,
     author = {Gras, Marie-Nicole},
     title = {$\protect \mathbb{Z}$-bases d{\textquoteright}entiers $1,\theta ,\theta ^2,\theta ^3$ dans les extensions cycliques de degr\'e~4 de $\protect \mathbb{Q}$},
     journal = {Publications math\'ematiques de la Facult\'e des sciences de Besan\c{c}on. Th\'eorie des nombres},
     eid = {6},
     pages = {1--15},
     publisher = {Universit\'e de Besan\c{c}on},
     year = {1981},
     doi = {10.5802/pmb.a-28},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.5802/pmb.a-28/}
}