@article{RM_2020_75_3_a1,
     author = {W. Jian and S. B. Kuksin and Y. Wu},
     title = {Krylov{\textendash}Bogolyubov averaging},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {427--444},
     year = {2020},
     volume = {75},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2020_75_3_a1/}
}