%0 Journal Article %A A. P. Afanas'ev %T A generalized isoperimetric problem with a linear shift in the objective function %J Differencialʹnye uravneniâ %D 1999 %P 600-605 %V 35 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1999_35_5_a2/ %G ru %F DE_1999_35_5_a2