@article{AUPO_1977__16_1_a3,
     author = {Fut\'ak, J\'an},
     title = {On zero points of solutions of the $n$-th order non-linear delay differential equation},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {61--68},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {1977},
     mrnumber = {0598484},
     zbl = {0396.34061},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1977__16_1_a3/}
}