@article{IVM_1975_1_a5,
     author = {V. K. Karpasyuk},
     title = {A~certain property of the characteristic exponent of the solution of {Hill's} equation},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {39--40},
     publisher = {mathdoc},
     number = {1},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1975_1_a5/}
}