@article{TM_1984_170_a2,
     author = {O. V. Besov},
     title = {The {Littlewood{\textendash}Paley} theorem for a~mixed norm},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {31--36},
     year = {1984},
     volume = {170},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1984_170_a2/}
}