Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1958_119_5_a12, author = {A. P. Shapiro}, title = {Characteristic polynomials of third order rational symmetric matrices}, journal = {Doklady Akademii Nauk}, pages = {890--892}, publisher = {mathdoc}, volume = {119}, number = {5}, year = {1958}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1958_119_5_a12/} }
A. P. Shapiro. Characteristic polynomials of third order rational symmetric matrices. Doklady Akademii Nauk, Tome 119 (1958) no. 5, pp. 890-892. http://geodesic.mathdoc.fr/item/DAN_1958_119_5_a12/