@article{MZM_1982_32_3_a4,
     author = {A. I. Vahabov},
     title = {Convergence of expansions of ordinary differential operators in {Fourier} series},
     journal = {Matemati\v{c}eskie zametki},
     pages = {303--307},
     publisher = {mathdoc},
     volume = {32},
     number = {3},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1982_32_3_a4/}
}