@article{VMUMM_2021_6_a4,
     author = {V. M. Budanov and L. F. Davudova},
     title = {The {Mathieu} equation near the boundaries of the second and third resonance zones},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {27--34},
     publisher = {mathdoc},
     number = {6},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2021_6_a4/}
}