@article{INTO_1999_64_a2,
     author = {S. M. Aseev},
     title = {An optimal control problem for a differential inclusion with a~phase constraint. {Smooth} approximations and necessary optimality conditions},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {57--81},
     publisher = {mathdoc},
     volume = {64},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_1999_64_a2/}
}