@article{TM_1987_180_a2,
     author = {V. I. Agoshkov},
     title = {On extension with preservation of smoothness class and on existence of traces of functions in spaces used in particle transport theory},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {23--24},
     year = {1987},
     volume = {180},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1987_180_a2/}
}