@article{ZVMMF_1977_17_4_a22,
     author = {G. P. Ivanova},
     title = {Singular controls in mathematical problems of physics},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1036--1040},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1977_17_4_a22/}
}