%0 Journal Article %A A. F. Beknazaryan %T On blowup of certain covering spaces %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 2015 %P 8-11 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_2015_1_a1/ %G en %F UZERU_2015_1_a1