@article{MZM_2017_102_3_a0,
     author = {L. A. Vlasenko and A. G. Rutkas},
     title = {Optimal {Control} of {Undamped} {Sobolev-Type} {Retarded} {Systems}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {323--338},
     publisher = {mathdoc},
     volume = {102},
     number = {3},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2017_102_3_a0/}
}