@article{VMUMM_1990_3_a16,
     author = {A. B. Kosterin},
     title = {A criterion for stability under the resonance 1:3},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {80--83},
     year = {1990},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1990_3_a16/}
}