@article{MZM_1992_51_6_a9,
     author = {M. A. Skopina},
     title = {The order of growth of quadratic partial sums of a double {Fourier} series},
     journal = {Matemati\v{c}eskie zametki},
     pages = {69--79},
     publisher = {mathdoc},
     volume = {51},
     number = {6},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1992_51_6_a9/}
}