@article{DE_1971_7_8_a21,
     author = {O. A. Liskovets},
     title = {The norm of an element as a regularizing functional},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1531--1533},
     publisher = {mathdoc},
     volume = {7},
     number = {8},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1971_7_8_a21/}
}