%0 Journal Article %A T. Ayano %A V. M. Buchstaber %T Ultraelliptic integrals and two-dimensional sigma-functions %J Funkcionalʹnyj analiz i ego priloženiâ %D 2019 %P 3-22 %V 53 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_2019_53_3_a0/ %G ru %F FAA_2019_53_3_a0