@article{CHFMJ_2019_4_3_a4,
     author = {V. N. Pavlenko and A. A. Asryan},
     title = {Periodic solutions existence for a second order differential equation with a discontinuous nonlinearity},
     journal = {\v{C}el\^abinskij fiziko-matemati\v{c}eskij \v{z}urnal},
     pages = {323--332},
     publisher = {mathdoc},
     volume = {4},
     number = {3},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHFMJ_2019_4_3_a4/}
}