@article{DE_1991_27_2_a19,
     author = {A. I. Vahabov},
     title = {On the violation of the equiconvergence of {Fourier} series that are connected with pencils of ordinary differential operators, and of trigonometric series},
     journal = {Differencialʹnye uravneni\^a},
     pages = {347--350},
     publisher = {mathdoc},
     volume = {27},
     number = {2},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_2_a19/}
}