@article{SM_2002_193_5_a1,
     author = {A. K. Gushchin},
     title = {A condition for the~compactness of operators in a~certain class and its application
},
     journal = {Sbornik. Mathematics},
     pages = {649--668},
     publisher = {mathdoc},
     volume = {193},
     number = {5},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2002_193_5_a1/}
}