Danilin, A. R. Asymptotic expansion of a solution to a singular perturbation optimal control problem on an interval with integral constraint. (English. Russian original) Zbl 1336.49003 Proc. Steklov Inst. Math. 291, Suppl. 1, S66-S76 (2015); translation from Tr. Inst. Mat. Mekh. (Ekaterinburg) 20, No. 3, 76-85 (2014). MSC: 49J15