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@article{DE_1982_18_8_a8, author = {V. M. Frolov}, title = {The width of the $n$th zone of instability of {Mathieu's} equation}, journal = {Differencialʹnye uravneni\^a}, pages = {1363--1368}, publisher = {mathdoc}, volume = {18}, number = {8}, year = {1982}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1982_18_8_a8/} }
V. M. Frolov. The width of the $n$th zone of instability of Mathieu's equation. Differencialʹnye uravneniâ, Tome 18 (1982) no. 8, pp. 1363-1368. http://geodesic.mathdoc.fr/item/DE_1982_18_8_a8/