@article{SJIM_2021_24_1_a3,
     author = {K. S. Musabekov},
     title = {Existence of a solution to a system of equations in variations in an optimal control problem},
     journal = {Sibirskij \v{z}urnal industrialʹnoj matematiki},
     pages = {48--66},
     publisher = {mathdoc},
     volume = {24},
     number = {1},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJIM_2021_24_1_a3/}
}