@article{DAN_1978_239_4_a9,
     author = {P. I. Lizorkin},
     title = {On the closure of the set of compactly supported functions in the weighted space $W^l_{p,\Phi}$},
     journal = {Doklady Akademii Nauk},
     pages = {789--792},
     year = {1978},
     volume = {239},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_239_4_a9/}
}