%0 Journal Article %A K. A. Kerian %T An example of double Fourier–Haar series with a nonregular subseries %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 2017 %P 18-21 %V 51 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_2017_51_1_a3/ %G en %F UZERU_2017_51_1_a3