@article{MZM_1974_16_2_a9,
     author = {I. V. Kamenev},
     title = {A~necessary and sufficient condition for nonoscillatory behavior of the solutions of a~system of two linear equations of the first order},
     journal = {Matemati\v{c}eskie zametki},
     pages = {259--265},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_16_2_a9/}
}