@article{IVM_1974_10_a9,
     author = {V. M. Shashkov},
     title = {Solution of a~certain problem of {Lions} on the existence of an optimal control in the coefficients of the derivatives},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {84--87},
     publisher = {mathdoc},
     number = {10},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1974_10_a9/}
}