@article{MASLO_2005__55_3_a5,
     author = {Olach, Rudolf and \v{S}amajov\'a, Helena},
     title = {Oscillatory properties of nonlinear differential systems with retarded arguments},
     journal = {Mathematica slovaca},
     pages = {307--316},
     publisher = {mathdoc},
     volume = {55},
     number = {3},
     year = {2005},
     mrnumber = {2181008},
     zbl = {1115.34063},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_2005__55_3_a5/}
}