@article{MZM_2020_107_3_a5,
     author = {A. O. Ignatyev},
     title = {On the {Existence} of {Homoclinic} {Orbits} in {Nonautonomous} {Second-Order} {Differential} {Equations}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {391--399},
     publisher = {mathdoc},
     volume = {107},
     number = {3},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2020_107_3_a5/}
}