@article{MZM_1971_10_2_a1,
     author = {I. V. Kamenev},
     title = {Some specifically nonlinear oscillation theorems},
     journal = {Matemati\v{c}eskie zametki},
     pages = {129--134},
     publisher = {mathdoc},
     volume = {10},
     number = {2},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1971_10_2_a1/}
}