%0 Journal Article %A Yu. R. Agachev %A M. Yu. Pershagin %T Well-posedness of boundary-value problems for conditionally well-posed integro-differential equations and polynomial approximations of their solutions %J Itogi nauki i tehniki. Sovremennaâ matematika i eë priloženiâ. Tematičeskie obzory %D 2020 %P 69-78 %V 175 %I mathdoc %U http://geodesic.mathdoc.fr/item/INTO_2020_175_a6/ %G ru %F INTO_2020_175_a6