@article{CMH_1984__59_139989,
     author = {W. H\"urlimann},
     title = {On algebraic tori of norm type.},
     journal = {Commentarii mathematici Helvetici},
     pages = {539--549},
     publisher = {mathdoc},
     volume = {59},
     year = {1984},
     zbl = {0571.12003},
     url = {http://geodesic.mathdoc.fr/item/CMH_1984__59_139989/}
}