@article{10_4064_aa_25_4_331_335,
     author = {J. Beard},
     title = {A rational canonical form for matrix fields},
     journal = {Acta Arithmetica},
     pages = {331--335},
     publisher = {mathdoc},
     volume = {25},
     number = {4},
     year = {1973},
     doi = {10.4064/aa-25-4-331-335},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-25-4-331-335/}
}