@article{ZNSL_1987_157_a12,
     author = {A. B. Gulisashvili},
     title = {Traces of functions belonging to {Sobolev} and {Besov} spaces and extensions from subsets of {Euclidean} space},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {137--145},
     publisher = {mathdoc},
     volume = {157},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1987_157_a12/}
}