@article{MZM_2013_93_1_a6,
     author = {V. V. Kozlov},
     title = {On {Bohl's} {Argument} {Theorem}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {72--80},
     publisher = {mathdoc},
     volume = {93},
     number = {1},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2013_93_1_a6/}
}