@article{MASLO_2001__51_5_a4,
     author = {Olach, Rudolf},
     title = {Oscillation of first order linear retarded equations},
     journal = {Mathematica slovaca},
     pages = {547--557},
     publisher = {mathdoc},
     volume = {51},
     number = {5},
     year = {2001},
     mrnumber = {1899275},
     zbl = {1012.34064},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_2001__51_5_a4/}
}