@article{TRSPY_1987_180_a30,
     author = {Ya. S. Bugrov},
     title = {Linear methods of summing {Fourier} series and fractional difference operators},
     journal = {Informatics and Automation},
     pages = {63--65},
     publisher = {mathdoc},
     volume = {180},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a30/}
}