@article{IVM_1963_2_a11, author = {Yu. A. Ryabov}, title = {On a method of finding a bound for the region of existence of periodic and almost periodic solutions of quasilinear differential equations with a small parameter and a non-linear characteristic of non-linearity}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {101--107}, publisher = {mathdoc}, number = {2}, year = {1963}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1963_2_a11/} }