@article{VSPUI_2023_19_4_a9,
     author = {A. V. Arguchintsev},
     title = {The variational optimality condition in the problem of minimizing the finite state norm by a composite system of hyperbolic and ordinary differential equations},
     journal = {Vestnik Sankt-Peterburgskogo universiteta. Prikladna\^a matematika, informatika, processy upravleni\^a},
     pages = {540--548},
     publisher = {mathdoc},
     volume = {19},
     number = {4},
     year = {2023},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSPUI_2023_19_4_a9/}
}