%0 Journal Article %T F.\,M.~Kirillova (on the occasion of her 90-th birthday) %J Trudy Instituta matematiki %D 2021 %P 4-9 %V 29 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TIMB_2021_29_1_a0/ %G ru %F TIMB_2021_29_1_a0