@article{VUU_2018_28_4_a7,
     author = {P. S. Krasil'nikov and O. M. Podvigina},
     title = {On evolution of the planet's obliquity in a non-resonant planetary system},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {549--564},
     publisher = {mathdoc},
     volume = {28},
     number = {4},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2018_28_4_a7/}
}