@article{MABA_1998_12_1-2_a17,
     author = {E. Minchev},
     title = {Oscillation of {Solutions} of {Impulsive} {Nonlinear} {Hyperbolic} {Differential-Difference} {Equations}},
     journal = {Mathematica balkanica},
     pages = {215},
     publisher = {mathdoc},
     volume = {12},
     number = {1-2},
     year = {1998},
     url = {http://geodesic.mathdoc.fr/item/MABA_1998_12_1-2_a17/}
}