@article{MZM_2006_79_4_a6,
     author = {A. V. Zuev},
     title = {On periodic solutions of ordinary differential equations with discontinuous right-hand side},
     journal = {Matemati\v{c}eskie zametki},
     pages = {560--570},
     publisher = {mathdoc},
     volume = {79},
     number = {4},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2006_79_4_a6/}
}