@article{IVM_1972_10_a1,
     author = {V. Bryuns},
     title = {The eigen- and associated functions of a~one-dimensional linear differential operator of order~$n$},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {7--12},
     publisher = {mathdoc},
     number = {10},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1972_10_a1/}
}