@article{RM_1963_18_3_a1,
     author = {A. B. Vasil'eva},
     title = {Asymptotic behaviour of solutions to certain problems involving non-linear differential equations containing a~small parameter multiplying the highest derivatives},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {13--84},
     publisher = {mathdoc},
     volume = {18},
     number = {3},
     year = {1963},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1963_18_3_a1/}
}