@article{CMFD_2021_67_2_a10,
     author = {V. A. Yurko},
     title = {Direct and inverse problems of spectral analysis for arbitrary-order differential operators with nonintegrable regular singularities},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {408--421},
     year = {2021},
     volume = {67},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2021_67_2_a10/}
}