@article{10_1007_s10587_013_0053_x,
     author = {Zhao, Zhengjun and Wu, Xia},
     title = {On the subfields of cyclotomic function fields},
     journal = {Czechoslovak Mathematical Journal},
     pages = {799--803},
     publisher = {mathdoc},
     volume = {63},
     number = {3},
     year = {2013},
     doi = {10.1007/s10587-013-0053-x},
     mrnumber = {3125655},
     zbl = {06282111},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10587-013-0053-x/}
}