@article{DE_2005_41_10_a4,
     author = {G. A. Kurina and S. S. Shchekunskikh},
     title = {Asymptotic {Solution} of a {Nonlinear} {Periodic} {Optimal} {Control} {Problem} {Whose} {State} {Equation} {Involves} a {Singular} {Matrix} {Perturbation}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1332--1344},
     publisher = {mathdoc},
     volume = {41},
     number = {10},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2005_41_10_a4/}
}