@article{MZM_1968_4_3_a2,
     author = {L. V. Zhizhiashvili},
     title = {A generalization of a theorem of {M.~Riesz} to the case of functions of several variables},
     journal = {Matemati\v{c}eskie zametki},
     pages = {269--280},
     publisher = {mathdoc},
     volume = {4},
     number = {3},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1968_4_3_a2/}
}