@article{MZM_2013_94_4_a5,
     author = {Kh. K. Ishkin},
     title = {On a {Trivial} {Monodromy} {Criterion} for the {Sturm--Liouville} {Equation}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {552--568},
     publisher = {mathdoc},
     volume = {94},
     number = {4},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2013_94_4_a5/}
}