@article{VUU_2020_30_4_a8,
     author = {A. P. Markeev},
     title = {On normal coordinates in the vicinity of the {Lagrangian} libration points of the restricted elliptic three-body problem},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {657--671},
     publisher = {mathdoc},
     volume = {30},
     number = {4},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2020_30_4_a8/}
}