%0 Journal Article %A V. I. Sumin %T Volterra Functional Equations in the Theory of Optimization of Distributed Systems. On the Problem of Singularity of Controlled Initial–Boundary Value Problems %J Trudy Instituta matematiki i mehaniki %D 2022 %P 188-201 %V 28 %N 3 %U http://geodesic.mathdoc.fr/item/TIMM_2022_28_3_a14/ %G ru %F TIMM_2022_28_3_a14