@article{MZM_1970_7_6_a9,
     author = {S. F. Morozov and V. I. Sumin},
     title = {Criterion for the compactness of a class of functions of $W_m^l$ ($1<ml\leqslant n$)},
     journal = {Matemati\v{c}eskie zametki},
     pages = {733--741},
     publisher = {mathdoc},
     volume = {7},
     number = {6},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1970_7_6_a9/}
}