@article{RM_1988_43_4_a19,
     author = {M. D. Mardanov},
     title = {Necessary second-order conditions for optimality in problems with delays in controls},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {221--222},
     publisher = {mathdoc},
     volume = {43},
     number = {4},
     year = {1988},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1988_43_4_a19/}
}