@article{IVM_1959_5_a21,
     author = {A. N. Cherkasov},
     title = {On the solutions of the equations $\dfrac{d^2x}{dt^2}=F\biggl(x,\dfrac{dx}{dt}\biggr)$},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {208--218},
     publisher = {mathdoc},
     number = {5},
     year = {1959},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1959_5_a21/}
}