@article{RM_1989_44_3_a9,
     author = {O. G. Galkin},
     title = {Resonance regions for dynamical systems of {Mathieu} type},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {191--192},
     publisher = {mathdoc},
     volume = {44},
     number = {3},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1989_44_3_a9/}
}