@article{MZM_2016_99_1_a1,
     author = {M. S. Bichegkuev},
     title = {Lyapunov {Transformation} of {Differential} {Operators} with {Unbounded} {Operator} {Coefficients}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {11--25},
     year = {2016},
     volume = {99},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2016_99_1_a1/}
}