@article{NSJOM_1984__14__a10,
     author = {Petkovi\'c M.S.},
     title = {Some estimations for polynomial complex zero},
     journal = {Novi Sad Journal of Mathematics},
     pages = {123-134},
     publisher = {mathdoc},
     volume = {14},
     year = {1984},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1984__14__a10/}
}