@article{10_4153_CMB_1968_070_5,
     author = {Ustina, Fred},
     title = {Convergence of the {Hausdorff} {Means} {ofDouble} {Fourier} {Series*}},
     journal = {Canadian mathematical bulletin},
     pages = {585--591},
     year = {1968},
     volume = {11},
     number = {4},
     doi = {10.4153/CMB-1968-070-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1968-070-5/}
}