@article{MZ_1993__214_1_174560,
     author = {Bill Jacob and P. Mammone and R. Aravire},
     title = {On the ...-invariant for quadratics forms and the linkage of cyclic algebras.},
     journal = {Mathematische Zeitschrift},
     pages = {137--146},
     publisher = {mathdoc},
     volume = {214},
     number = {1},
     year = {1993},
     zbl = {0788.11014},
     url = {http://geodesic.mathdoc.fr/item/MZ_1993__214_1_174560/}
}