@article{ZNSL_1976_56_a15,
     author = {N. A. Shirokov},
     title = {Some embedding theorem for spaces of harmonic functions},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {191--194},
     year = {1976},
     volume = {56},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1976_56_a15/}
}