@article{VMUMM_1992_2_a5,
     author = {A. S. Fursov},
     title = {Stability and instability radii for polynomials of the third and fourth degrees},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {28--33},
     publisher = {mathdoc},
     number = {2},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1992_2_a5/}
}