@article{IVM_1962_6_a13,
     author = {Yu. A. Ryabov},
     title = {On a method of finding a bound for the region of convergence of periodic series which are solutions of quasi-linear differential equations with small parameter. {The} case of resonance},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {108--118},
     publisher = {mathdoc},
     number = {6},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1962_6_a13/}
}