@article{MOMA_1990__109_2_178461,
     author = {Q. Chuanxi and G. Ladas},
     title = {Oscillations of {First-Order} {Neutral} {Equations} with {Variable} {Coefficients.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {103--112},
     publisher = {mathdoc},
     volume = {109},
     number = {2},
     year = {1990},
     zbl = {0713.34071},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1990__109_2_178461/}
}