@article{DAN_1982_264_3_a5,
     author = {D. O. Logofet and N. B. Ul'yanov},
     title = {Necessary and sufficient conditions for sign stability of matrices},
     journal = {Doklady Akademii Nauk},
     pages = {542--546},
     year = {1982},
     volume = {264},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1982_264_3_a5/}
}