@article{IM2_1977_11_4_a9,
     author = {L. D. Gogoladze},
     title = {On $(H,k)$-summability of multiple trigonometric {Fourier} series},
     journal = {Izvestiya. Mathematics },
     pages = {889--908},
     publisher = {mathdoc},
     volume = {11},
     number = {4},
     year = {1977},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1977_11_4_a9/}
}