@article{TRSPY_1974_131_a5,
     author = {V. I. Burenkov},
     title = {The approximation of functions in the space $W_p^r(\Omega )$ by compactly supported functions for an arbitrary open set~$\Omega $},
     journal = {Informatics and Automation},
     pages = {51--63},
     publisher = {mathdoc},
     volume = {131},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1974_131_a5/}
}