@article{DAN_1960_133_2_a9,
     author = {Yu. A. Ryabov},
     title = {The application of the method of small parameters in obtaining solutions of differential equations with delayed arguments},
     journal = {Doklady Akademii Nauk},
     pages = {288--291},
     publisher = {mathdoc},
     volume = {133},
     number = {2},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_133_2_a9/}
}