@article{VMUMM_2010_2_a0,
     author = {A. M. D'yachenko},
     title = {Properties of {Ces\`aro} means of double {Fourier} series},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {3--11},
     year = {2010},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2010_2_a0/}
}