%0 Journal Article %A Ushangi Goginava %T Convergence of logarithmic means of quadratic partial sums of double Fourier series %J Colloquium Mathematicum %D 2013 %P 99-112 %V 131 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm131-1-9/ %R 10.4064/cm131-1-9 %G en %F 10_4064_cm131_1_9