@article{SMJ2_1999_25_1_a5,
     author = {Kostov, Vladimir},
     title = {On the {Hyperbolicity} {Domain} of the {Polynomial} x^n + a1x^(n-1) + 1/4+ an},
     journal = {Serdica Mathematical Journal},
     pages = {47--70},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_1999_25_1_a5/}
}