@article{DE_1997_33_10_a11,
     author = {Yu. A. Dubinskii},
     title = {On the best extension of a periodic function and on the corresponding boundary value problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1382--1393},
     publisher = {mathdoc},
     volume = {33},
     number = {10},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_10_a11/}
}