%0 Journal Article %A V. P. Burskii %T Some new methods for studying boundary value problems for %J Teoretičeskaâ i matematičeskaâ fizika %D 2024 %P 48-59 %V 218 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_2024_218_1_a2/ %G ru %F TMF_2024_218_1_a2