%0 Journal Article %A A. B. Bogatyrev %A O. A. Grigor'ev %T Filtration under a Stepped Dam and Riemann Theta Functions %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2020 %P 14-26 %V 311 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_2020_311_a1/ %G ru %F TM_2020_311_a1