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@article{TM_1995_211_a28, author = {M. M. Khapaev}, title = {Singular differential equations in control and minimization problems}, journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova}, pages = {411--418}, publisher = {mathdoc}, volume = {211}, year = {1995}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TM_1995_211_a28/} }
M. M. Khapaev. Singular differential equations in control and minimization problems. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Optimal control and differential equations, Tome 211 (1995), pp. 411-418. http://geodesic.mathdoc.fr/item/TM_1995_211_a28/